GMC SIERRA 3500 2020

Complete listing of complaints and recalls for this vehicle

65
Complaints
17
Recalls

Complaints & Recalls

65 Complaints 17 Recalls

Official Safety Recalls - Important!

17 Recalls

These are official manufacturer recalls ordered by NHTSA for safety defects. If you own this vehicle, contact your dealer immediately for free repairs.

General Motors, Llc
NHTSA Campaign: 24V797000 SAFETY RECALL
463.3K Vehicles Affected
Recall Date: Oct 24, 2024
Safety Issue:

General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control valve may fail and cause the rear wheels to lock-up.

Potential Risk:
Rear wheel lock-up can increase the risk of a crash.
FREE Recall Solution:
Dealers will install new transmission control module software, free of charge. GM will provide a special coverage program to cover the repair of transmissions that are identified by the remedy software as containing a defective control valve. Owner notification letters were mailed December 12, 2024. Owners may contact GM customer service at 1-888-988-7267, Cadillac customer service at 1-800-458-8006, GMC customer service at GMC 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242454440.
Additional Details:

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153) or go to www.nhtsa.gov.

Action Required: Contact your local GMC dealer to schedule your FREE recall repair.
Manufacturer: GMC
Mfg Campaign: N242454440
Notice Date: Dec 12, 2024
Recall Date: Oct 24, 2024
General Motors, Llc
NHTSA Campaign: 24V060000 SAFETY RECALL
570.4K Vehicles Affected
Recall Date: Feb 1, 2024
Safety Issue:

General Motors, LLC (GM) is recalling certain 2020-2024 Chevrolet Silverado 2500, 3500, GMC Sierra 2500 and 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate inadvertently unlatching while the vehicle is in park.

Potential Risk:
An unlatched tailgate may open while driving and result in a loss of unsecured cargo, creating a road hazard and increasing the risk of a crash.
FREE Recall Solution:
Owners are advised to check that the tailgate is closed and latched before driving. Dealers will replace the exterior touchpad switch assemblies, free of charge. Owner notification letters were mailed May 17, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232426400.
Additional Details:

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Action Required: Contact your local GMC dealer to schedule your FREE recall repair.
Manufacturer: GMC
Mfg Campaign: N232426400
Notice Date: May 17, 2024
Recall Date: Feb 1, 2024
General Motors, Llc
NHTSA Campaign: 20V792000 SAFETY RECALL
624.2K Vehicles Affected
Recall Date: Dec 17, 2020
Safety Issue:

General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat belt brackets may not be secured to the seat frame in the front-row center seating position.

Potential Risk:
If a seat-belt bracket is not secured, the seat belt may not properly restrain an occupant in the front-row center seat position, increasing the risk of injury in a crash.
FREE Recall Solution:
GM will notify owners, and dealers will inspect left-side and right-side front-row center seat-belt bracket attachments and reassemble it correctly as necessary, free of charge. The recall began January 26, 2021. Owners may contact GMC customer service at 1-800-462-8782, Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202314670.
Additional Details:

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Action Required: Contact your local GMC dealer to schedule your FREE recall repair.
Manufacturer: GMC
Mfg Campaign: N202314670
Notice Date: Jan 26, 2021
Recall Date: Dec 17, 2020
General Motors Llc
NHTSA Campaign: 20V446000 SAFETY RECALL
769 Vehicles Affected
Recall Date: Jul 30, 2020
Safety Issue:

General Motors, LLC. (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5 and XT6, Chevrolet Blazer, Silverado 1500, 2500 and 3500 and Traverse and GMC Acadia and Sierra 1500, 2500 and 3500 vehicles. The diffuser component of the Roof-Rail Air Bag (RRAB) inflator may not have been properly crimped to the inflator and could separate from the inflator during air bag deployment.

Potential Risk:
If the diffuser separates from the inflator during deployment, RRAB performance may be degraded, increasing the risk of injury in a crash.
FREE Recall Solution:
GM will notify owners, and dealers will replace the suspect RRAB modules, free of charge. The recall began September 3, 2020. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-333-4223, or Buick customer service at 1-800-521-7300. GM's number for this recall is N202305380.
Additional Details:

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Action Required: Contact your local GMC dealer to schedule your FREE recall repair.
Manufacturer: GMC
Mfg Campaign: N202305380
Notice Date: Sep 3, 2020
Recall Date: Jul 30, 2020
General Motors Llc
NHTSA Campaign: 20V324000 SAFETY RECALL
272 Vehicles Affected
Recall Date: Jun 4, 2020
Safety Issue:

General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles previously recalled under 20V-142. Some of the vehicles in 20V-324 were not part of Recall 20V-142 but received defect parts during another service (typically during collision repair). The hood-latch striker wires on replacement hoods installed for Safety Recall 20V-142 may not have been heat-treated properly, possibly causing them to fracture.

Potential Risk:
If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.
FREE Recall Solution:
GM will notify owners, and dealers will replace the hood assembly, free of charge. For hoods sold over the counter, dealers will contact customers with instructions for hood replacement. The recall began July 7, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N202306490.
Additional Details:

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Action Required: Contact your local GMC dealer to schedule your FREE recall repair.
Manufacturer: GMC
Mfg Campaign: N202306490
Notice Date: Jul 7, 2020
Recall Date: Jun 4, 2020
General Motors Llc
NHTSA Campaign: 20V142000 SAFETY RECALL
1.9K Vehicles Affected
Recall Date: Mar 12, 2020
Safety Issue:

General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The hood-latch striker wires may not have been heat-treated properly, possibly causing them to fracture.

Potential Risk:
If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.
FREE Recall Solution:
GM will notify owners, and dealers will replace the hood assembly, free of charge. The recall began April 13, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192284960.
Additional Details:

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Action Required: Contact your local GMC dealer to schedule your FREE recall repair.
Manufacturer: GMC
Mfg Campaign: N192284960
Notice Date: Apr 13, 2020
Recall Date: Mar 12, 2020
General Motors Llc
NHTSA Campaign: 19V814000 SAFETY RECALL
556.4K Vehicles Affected
Recall Date: Nov 14, 2019
Safety Issue:

General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2020 Silverado 2500, Silverado 3500, Sierra 2500, and Sierra 3500 vehicles equipped with carpet floor covering. When the front seat belt pretensioners deploy, hot gas may vent through an opening in the pretensioner bracket, possibly igniting the carpet.

Potential Risk:
A vehicle fire could result if materials ignite inside the vehicle.
FREE Recall Solution:
GM will notify owners, and dealers will close off the opening in the pretensioner bracket, free of charge. The recall began December 13, 2019. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192270600.
Additional Details:

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Action Required: Contact your local GMC dealer to schedule your FREE recall repair.
Manufacturer: GMC
Mfg Campaign: N192270600
Notice Date: Dec 13, 2019
Recall Date: Nov 14, 2019

Consumer Complaints

65 Complaints
General Motors, Llc
Campaign: 11501953 Other
Jan 16, 2023
Defect Description:

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

Potential Consequences:

Rear tires locking up out of no where almost made me jack knife.

Corrective Action:

Rear tires locking up out of no where almost made me jack knife.

Additional Notes:

Rear tires locking up out of no where almost made me jack knife.

Manufacturer: GMC
Mfg Campaign: 11501953
Notice Date: Jan 16, 2023
Recall Date: Jan 16, 2023
General Motors, Llc
Campaign: 11497794 Other
Dec 16, 2022
Defect Description:

STRUCTURE:BODY

Potential Consequences:

Rear window leaking on 2020 gmc truck due to faulty rear window seal and plastic slide. Known issue in 2020 models with a service bulletin already in place. Headliner saturated and black mold showing. Rear back liner has been saturated multiple times and gmc would not refund the cost of a whole new window to be put in and reimbursed. GM bulletin # is 18-NA-383

Corrective Action:

Rear window leaking on 2020 gmc truck due to faulty rear window seal and plastic slide. Known issue in 2020 models with a service bulletin already in place. Headliner saturated and black mold showing. Rear back liner has been saturated multiple times and gmc would not refund the cost of a whole new window to be put in and reimbursed. GM bulletin # is 18-NA-383

Additional Notes:

Rear window leaking on 2020 gmc truck due to faulty rear window seal and plastic slide. Known issue in 2020 models with a service bulletin already in place. Headliner saturated and black mold showing. Rear back liner has been saturated multiple times and gmc would not refund the cost of a whole new window to be put in and reimbursed. GM bulletin # is 18-NA-383

Manufacturer: GMC
Mfg Campaign: 11497794
Notice Date: Dec 16, 2022
Recall Date: Dec 16, 2022
General Motors, Llc
Campaign: 11495345 Other
Nov 29, 2022
Defect Description:

TIRES:TREAD/BELT

Potential Consequences:

Goodyear Wrangler Trailrunner AT, LT275/65R20, factory installed on a 2020 GMC Sierra Denali 3500. While traveling 60 mph pulling a fifth wheel in South Texas on a clear and dry day, the rear passenger tire unexpectedly lost its tread. As we slowed down, it completely lost tire pressure and we ran on the rim until coming to a complete stop. Immediately prior to the incident, the TPMS and other safety systems in the truck read normal. There were no system warnings and no objects in the road. It put us in a dangerous situation as we were stopped on the shoulder of the highway right before a bridge and had our 3 children in the backseat. We called the police, but they never sent anyone to help with traffic. The rear fender and the wheel well of the truck were badly damaged. We have the faulty tire and it is available for inspection.

Corrective Action:

Goodyear Wrangler Trailrunner AT, LT275/65R20, factory installed on a 2020 GMC Sierra Denali 3500. While traveling 60 mph pulling a fifth wheel in South Texas on a clear and dry day, the rear passenger tire unexpectedly lost its tread. As we slowed down, it completely lost tire pressure and we ran on the rim until coming to a complete stop. Immediately prior to the incident, the TPMS and other safety systems in the truck read normal. There were no system warnings and no objects in the road. It put us in a dangerous situation as we were stopped on the shoulder of the highway right before a bridge and had our 3 children in the backseat. We called the police, but they never sent anyone to help with traffic. The rear fender and the wheel well of the truck were badly damaged. We have the faulty tire and it is available for inspection.

Additional Notes:

Goodyear Wrangler Trailrunner AT, LT275/65R20, factory installed on a 2020 GMC Sierra Denali 3500. While traveling 60 mph pulling a fifth wheel in South Texas on a clear and dry day, the rear passenger tire unexpectedly lost its tread. As we slowed down, it completely lost tire pressure and we ran on the rim until coming to a complete stop. Immediately prior to the incident, the TPMS and other safety systems in the truck read normal. There were no system warnings and no objects in the road. It put us in a dangerous situation as we were stopped on the shoulder of the highway right before a bridge and had our 3 children in the backseat. We called the police, but they never sent anyone to help with traffic. The rear fender and the wheel well of the truck were badly damaged. We have the faulty tire and it is available for inspection.

Manufacturer: GMC
Mfg Campaign: 11495345
Notice Date: Nov 29, 2022
Recall Date: Nov 29, 2022
General Motors, Llc
Campaign: 11493546 Other
Nov 14, 2022
Defect Description:

ENGINE

Potential Consequences:

Plugged in engine block heater and the car erupted in flames. Total loss.

Corrective Action:

Plugged in engine block heater and the car erupted in flames. Total loss.

Additional Notes:

Plugged in engine block heater and the car erupted in flames. Total loss.

Manufacturer: GMC
Mfg Campaign: 11493546
Notice Date: Nov 14, 2022
Recall Date: Nov 14, 2022
General Motors, Llc
Campaign: 11493546 Other
Nov 14, 2022
Defect Description:

ELECTRICAL SYSTEM

Potential Consequences:

Plugged in engine block heater and the car erupted in flames. Total loss.

Corrective Action:

Plugged in engine block heater and the car erupted in flames. Total loss.

Additional Notes:

Plugged in engine block heater and the car erupted in flames. Total loss.

Manufacturer: GMC
Mfg Campaign: 11493546
Notice Date: Nov 14, 2022
Recall Date: Nov 14, 2022
General Motors, Llc
Campaign: 11493546 Other
Nov 14, 2022
Defect Description:

STRUCTURE:BODY

Potential Consequences:

Plugged in engine block heater and the car erupted in flames. Total loss.

Corrective Action:

Plugged in engine block heater and the car erupted in flames. Total loss.

Additional Notes:

Plugged in engine block heater and the car erupted in flames. Total loss.

Manufacturer: GMC
Mfg Campaign: 11493546
Notice Date: Nov 14, 2022
Recall Date: Nov 14, 2022
General Motors, Llc
Campaign: 11485406 Other
Sep 20, 2022
Defect Description:

POWER TRAIN

Potential Consequences:

The exhaust system is directed to the rear of the vehicle and when towing causes extreme heat to build on the item being towed, in my case a 5th wheel camper. The heat has melted the trim on my camper and is a potential fire hazard.

Corrective Action:

The exhaust system is directed to the rear of the vehicle and when towing causes extreme heat to build on the item being towed, in my case a 5th wheel camper. The heat has melted the trim on my camper and is a potential fire hazard.

Additional Notes:

The exhaust system is directed to the rear of the vehicle and when towing causes extreme heat to build on the item being towed, in my case a 5th wheel camper. The heat has melted the trim on my camper and is a potential fire hazard.

Manufacturer: GMC
Mfg Campaign: 11485406
Notice Date: Sep 20, 2022
Recall Date: Sep 20, 2022
General Motors, Llc
Campaign: 11482843 Other
Sep 4, 2022
Defect Description:

TIRES

Potential Consequences:

These tires are Good Year Wrangler Trail Runner AT size LT275/65 R20. My total mileage on these tires was 42,751. These were the original tires that were installed when the truck was purchased new. My Tires are rotated every 7,500 miles. Tire pressure is maintained at the exact pressure and in this case was just checked 4 days prior to the incident. I was driving on an interstate at 70 mph. A vibration started. I checked the Tire pressure monitors and all showed normal pressures. About 4 minutes later the vibration increased and I decided to pull over. I had slowed to about 45 mph and had my turn signal On, as I was intending to pull on to the right shoulder. Suddenly the left rear tire exploded, and tread had separated. My truck was damaged . All the components in the wheel well are gone or damaged. The left rear 1/4 panel/fender is bent. NO repair estimate yet. After the incident I saw zero pressure on that tire indicating on the TPMS.

Corrective Action:

These tires are Good Year Wrangler Trail Runner AT size LT275/65 R20. My total mileage on these tires was 42,751. These were the original tires that were installed when the truck was purchased new. My Tires are rotated every 7,500 miles. Tire pressure is maintained at the exact pressure and in this case was just checked 4 days prior to the incident. I was driving on an interstate at 70 mph. A vibration started. I checked the Tire pressure monitors and all showed normal pressures. About 4 minutes later the vibration increased and I decided to pull over. I had slowed to about 45 mph and had my turn signal On, as I was intending to pull on to the right shoulder. Suddenly the left rear tire exploded, and tread had separated. My truck was damaged . All the components in the wheel well are gone or damaged. The left rear 1/4 panel/fender is bent. NO repair estimate yet. After the incident I saw zero pressure on that tire indicating on the TPMS.

Additional Notes:

These tires are Good Year Wrangler Trail Runner AT size LT275/65 R20. My total mileage on these tires was 42,751. These were the original tires that were installed when the truck was purchased new. My Tires are rotated every 7,500 miles. Tire pressure is maintained at the exact pressure and in this case was just checked 4 days prior to the incident. I was driving on an interstate at 70 mph. A vibration started. I checked the Tire pressure monitors and all showed normal pressures. About 4 minutes later the vibration increased and I decided to pull over. I had slowed to about 45 mph and had my turn signal On, as I was intending to pull on to the right shoulder. Suddenly the left rear tire exploded, and tread had separated. My truck was damaged . All the components in the wheel well are gone or damaged. The left rear 1/4 panel/fender is bent. NO repair estimate yet. After the incident I saw zero pressure on that tire indicating on the TPMS.

Manufacturer: GMC
Mfg Campaign: 11482843
Notice Date: Sep 4, 2022
Recall Date: Sep 4, 2022
General Motors, Llc
Campaign: 11471359 Other
4 Vehicles Affected
Jun 28, 2022
Defect Description:

ELECTRICAL SYSTEM:12V/24V/48V BATTERY

Potential Consequences:

The component that failed was the passenger side or main battery. Our safety was compromised when the design of the HVAC system and the battery location allowed the hydrogen sulfide gas into the passenger compartment of the vehicle. The issue has not been confirmed by a deal or independent service center. The battery(s) and vehicle are available for inspection to confirm the issue. I have uploaded pictures of the battery and one can visually see the swollen battery with liquid leaking out of it. There were no warning messages or other symptoms prior to the failure. The rotten egg smell started shortly after the truck was started and my three young children were in the truck for about 10-15 minutes while I was loading items in the bed of the truck. When I entered the vehicle, the smell was extremely strong and my eyes started burning. I opened all the windows to air out the passenger compartment and thought it was possible off gassing from the nearby septic field. Once driving with the windows now closed, the smell came back instantly and very strong. My children started complaining of headache and nausea. For the next part of the trip, we drove with the windows down. When we arrived at our destination, I was able to determine the smell was coming out of the HVAC system while in normal "Auto" mode. Opening the hood, I went to smell around the engine compartment and when I got over the passenger side main battery, the rotten egg smell was so strong that my nose and eyes instantly started burning. We then drove the truck home with the windows closed and the HVAC system in recirculate but the smell still entered the passenger compartment. All four of us had symptoms of hydrogen sulfide poisoning with my son being the worse with multiple vomiting episodes immediately upon exiting the vehicle. Poison Control was notified and all four of us were evaluated in our local Emergency Department for Inhalation Toxin. The truck is all OEM.

Corrective Action:

The component that failed was the passenger side or main battery. Our safety was compromised when the design of the HVAC system and the battery location allowed the hydrogen sulfide gas into the passenger compartment of the vehicle. The issue has not been confirmed by a deal or independent service center. The battery(s) and vehicle are available for inspection to confirm the issue. I have uploaded pictures of the battery and one can visually see the swollen battery with liquid leaking out of it. There were no warning messages or other symptoms prior to the failure. The rotten egg smell started shortly after the truck was started and my three young children were in the truck for about 10-15 minutes while I was loading items in the bed of the truck. When I entered the vehicle, the smell was extremely strong and my eyes started burning. I opened all the windows to air out the passenger compartment and thought it was possible off gassing from the nearby septic field. Once driving with the windows now closed, the smell came back instantly and very strong. My children started complaining of headache and nausea. For the next part of the trip, we drove with the windows down. When we arrived at our destination, I was able to determine the smell was coming out of the HVAC system while in normal "Auto" mode. Opening the hood, I went to smell around the engine compartment and when I got over the passenger side main battery, the rotten egg smell was so strong that my nose and eyes instantly started burning. We then drove the truck home with the windows closed and the HVAC system in recirculate but the smell still entered the passenger compartment. All four of us had symptoms of hydrogen sulfide poisoning with my son being the worse with multiple vomiting episodes immediately upon exiting the vehicle. Poison Control was notified and all four of us were evaluated in our local Emergency Department for Inhalation Toxin. The truck is all OEM.

Additional Notes:

The component that failed was the passenger side or main battery. Our safety was compromised when the design of the HVAC system and the battery location allowed the hydrogen sulfide gas into the passenger compartment of the vehicle. The issue has not been confirmed by a deal or independent service center. The battery(s) and vehicle are available for inspection to confirm the issue. I have uploaded pictures of the battery and one can visually see the swollen battery with liquid leaking out of it. There were no warning messages or other symptoms prior to the failure. The rotten egg smell started shortly after the truck was started and my three young children were in the truck for about 10-15 minutes while I was loading items in the bed of the truck. When I entered the vehicle, the smell was extremely strong and my eyes started burning. I opened all the windows to air out the passenger compartment and thought it was possible off gassing from the nearby septic field. Once driving with the windows now closed, the smell came back instantly and very strong. My children started complaining of headache and nausea. For the next part of the trip, we drove with the windows down. When we arrived at our destination, I was able to determine the smell was coming out of the HVAC system while in normal "Auto" mode. Opening the hood, I went to smell around the engine compartment and when I got over the passenger side main battery, the rotten egg smell was so strong that my nose and eyes instantly started burning. We then drove the truck home with the windows closed and the HVAC system in recirculate but the smell still entered the passenger compartment. All four of us had symptoms of hydrogen sulfide poisoning with my son being the worse with multiple vomiting episodes immediately upon exiting the vehicle. Poison Control was notified and all four of us were evaluated in our local Emergency Department for Inhalation Toxin. The truck is all OEM.

Manufacturer: GMC
Mfg Campaign: 11471359
Notice Date: Jun 28, 2022
Recall Date: Jun 28, 2022
General Motors, Llc
Campaign: 11456331 Other
Mar 11, 2022
Defect Description:

UNKNOWN OR OTHER

Potential Consequences:

In short, the Diesel Exhaust Fluid (DEF) reductant heater failed which requires the entire DEF tank assembly (part 85138746) to be replaced on my 2020 GMC Sierra 3500. This cause the truck to go into "limp" mode where it will not travel above 65 mph, and after another period, the speed continues to be reduced down to 25 mph. Prior to the speed being reduced, there is a warning message that appears stating "Service DEF System See Owner's Manual" and a warning light illuminates in the gauge cluster. Any severe reduction in speed that can cause the truck to go "limp" is a safety concern. In addition to being a safety concern, some quick internet research reveals that this has been a known problem with GM's DEF system since at least 2019. The electrical connections are too small for the current which supplied the DEF tank heater, causing the system to short and trigger the truck into limp mode which renders it useless. The replacement part is on national backorder, and it has been on backorder for years. My truck is completely useless until this part (or a better-engineered replacement) arrives at the dealer, and there are hundreds if not thousands of people waiting on this same, defective part to get their trucks back on the road. People are losing their livelihood and the means by which they support their families. GM has known about this defective part for years and has done nothing- neither engineered a better part nor issued a recall with some kind of workaround. They haven't even been able to stock the defective part, and this is not just a supply chain issue as new trucks are still being built. This problem was not inspected by any police or insurance agency as it did not cause an accident or injury in this case.

Corrective Action:

In short, the Diesel Exhaust Fluid (DEF) reductant heater failed which requires the entire DEF tank assembly (part 85138746) to be replaced on my 2020 GMC Sierra 3500. This cause the truck to go into "limp" mode where it will not travel above 65 mph, and after another period, the speed continues to be reduced down to 25 mph. Prior to the speed being reduced, there is a warning message that appears stating "Service DEF System See Owner's Manual" and a warning light illuminates in the gauge cluster. Any severe reduction in speed that can cause the truck to go "limp" is a safety concern. In addition to being a safety concern, some quick internet research reveals that this has been a known problem with GM's DEF system since at least 2019. The electrical connections are too small for the current which supplied the DEF tank heater, causing the system to short and trigger the truck into limp mode which renders it useless. The replacement part is on national backorder, and it has been on backorder for years. My truck is completely useless until this part (or a better-engineered replacement) arrives at the dealer, and there are hundreds if not thousands of people waiting on this same, defective part to get their trucks back on the road. People are losing their livelihood and the means by which they support their families. GM has known about this defective part for years and has done nothing- neither engineered a better part nor issued a recall with some kind of workaround. They haven't even been able to stock the defective part, and this is not just a supply chain issue as new trucks are still being built. This problem was not inspected by any police or insurance agency as it did not cause an accident or injury in this case.

Additional Notes:

In short, the Diesel Exhaust Fluid (DEF) reductant heater failed which requires the entire DEF tank assembly (part 85138746) to be replaced on my 2020 GMC Sierra 3500. This cause the truck to go into "limp" mode where it will not travel above 65 mph, and after another period, the speed continues to be reduced down to 25 mph. Prior to the speed being reduced, there is a warning message that appears stating "Service DEF System See Owner's Manual" and a warning light illuminates in the gauge cluster. Any severe reduction in speed that can cause the truck to go "limp" is a safety concern. In addition to being a safety concern, some quick internet research reveals that this has been a known problem with GM's DEF system since at least 2019. The electrical connections are too small for the current which supplied the DEF tank heater, causing the system to short and trigger the truck into limp mode which renders it useless. The replacement part is on national backorder, and it has been on backorder for years. My truck is completely useless until this part (or a better-engineered replacement) arrives at the dealer, and there are hundreds if not thousands of people waiting on this same, defective part to get their trucks back on the road. People are losing their livelihood and the means by which they support their families. GM has known about this defective part for years and has done nothing- neither engineered a better part nor issued a recall with some kind of workaround. They haven't even been able to stock the defective part, and this is not just a supply chain issue as new trucks are still being built. This problem was not inspected by any police or insurance agency as it did not cause an accident or injury in this case.

Manufacturer: GMC
Mfg Campaign: 11456331
Notice Date: Mar 11, 2022
Recall Date: Mar 11, 2022
General Motors, Llc
Campaign: 11440826 Other
Nov 17, 2021
Defect Description:

ELECTRICAL SYSTEM

Potential Consequences:

Infotainment system AND center instrument cluster went completely black - six times over the course of one month. I took the truck to Alan Webb Chevrolet in Vancouver Washington. Their service technician was aware of infotainment system “Black Screen of Death - BSD” problems due to previous repair work on several different GM models. However, on the way to their Service Department to get this fixed, I rolled down the driver’s side window about 6 inches to get some fresh air and rolled it back up. Out of nowhere the Infotainment system AND the center instrument cluster came back to life. No rhyme, no reason and both stayed on (illuminated). Their Service Technician could NOT recreate the BSD. They had my truck for more than one week AND said they were working with GM engineers to resolve this issue. GM case number SR 9-7065134382. I’m driving and towing my 5th wheel blind without a remedy for this electrical issue.

Corrective Action:

Infotainment system AND center instrument cluster went completely black - six times over the course of one month. I took the truck to Alan Webb Chevrolet in Vancouver Washington. Their service technician was aware of infotainment system “Black Screen of Death - BSD” problems due to previous repair work on several different GM models. However, on the way to their Service Department to get this fixed, I rolled down the driver’s side window about 6 inches to get some fresh air and rolled it back up. Out of nowhere the Infotainment system AND the center instrument cluster came back to life. No rhyme, no reason and both stayed on (illuminated). Their Service Technician could NOT recreate the BSD. They had my truck for more than one week AND said they were working with GM engineers to resolve this issue. GM case number SR 9-7065134382. I’m driving and towing my 5th wheel blind without a remedy for this electrical issue.

Additional Notes:

Infotainment system AND center instrument cluster went completely black - six times over the course of one month. I took the truck to Alan Webb Chevrolet in Vancouver Washington. Their service technician was aware of infotainment system “Black Screen of Death - BSD” problems due to previous repair work on several different GM models. However, on the way to their Service Department to get this fixed, I rolled down the driver’s side window about 6 inches to get some fresh air and rolled it back up. Out of nowhere the Infotainment system AND the center instrument cluster came back to life. No rhyme, no reason and both stayed on (illuminated). Their Service Technician could NOT recreate the BSD. They had my truck for more than one week AND said they were working with GM engineers to resolve this issue. GM case number SR 9-7065134382. I’m driving and towing my 5th wheel blind without a remedy for this electrical issue.

Manufacturer: GMC
Mfg Campaign: 11440826
Notice Date: Nov 17, 2021
Recall Date: Nov 17, 2021
General Motors, Llc
Campaign: 11418595 Other
May 26, 2021
Defect Description:

SERVICE BRAKES

Potential Consequences:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Corrective Action:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Additional Notes:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Manufacturer: GMC
Mfg Campaign: 11418595
Notice Date: May 26, 2021
Recall Date: May 26, 2021
General Motors, Llc
Campaign: 11418595 Other
May 26, 2021
Defect Description:

ELECTRICAL SYSTEM

Potential Consequences:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Corrective Action:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Additional Notes:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Manufacturer: GMC
Mfg Campaign: 11418595
Notice Date: May 26, 2021
Recall Date: May 26, 2021
General Motors, Llc
Campaign: 11418595 Other
May 26, 2021
Defect Description:

POWER TRAIN

Potential Consequences:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Corrective Action:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Additional Notes:

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in Santa Rosa New Mexico. The dealer Glenn Polk in Sanger has been working on for the last 4 months There is never a warning until the lights come on with a system failure.

Manufacturer: GMC
Mfg Campaign: 11418595
Notice Date: May 26, 2021
Recall Date: May 26, 2021
General Motors, Llc
Campaign: 11418617 Other
May 26, 2021
Defect Description:

SERVICE BRAKES

Potential Consequences:

The computer lights up dash reducing power and taking the trailer brakes away. This almost caused a wreck when the truck shut off and the brakes failed. This truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure. Glenn Polk Chevrolet in Sanger has been working on this since the truck was new. Also we have case open with General Motors without resolution. The dash lights up at the same time as the brakes fail.

Corrective Action:

The computer lights up dash reducing power and taking the trailer brakes away. This almost caused a wreck when the truck shut off and the brakes failed. This truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure. Glenn Polk Chevrolet in Sanger has been working on this since the truck was new. Also we have case open with General Motors without resolution. The dash lights up at the same time as the brakes fail.

Additional Notes:

The computer lights up dash reducing power and taking the trailer brakes away. This almost caused a wreck when the truck shut off and the brakes failed. This truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure. Glenn Polk Chevrolet in Sanger has been working on this since the truck was new. Also we have case open with General Motors without resolution. The dash lights up at the same time as the brakes fail.

Manufacturer: GMC
Mfg Campaign: 11418617
Notice Date: May 26, 2021
Recall Date: May 26, 2021
General Motors, Llc
Campaign: 11418617 Other
May 26, 2021
Defect Description:

ELECTRICAL SYSTEM

Potential Consequences:

The computer lights up dash reducing power and taking the trailer brakes away. This almost caused a wreck when the truck shut off and the brakes failed. This truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure. Glenn Polk Chevrolet in Sanger has been working on this since the truck was new. Also we have case open with General Motors without resolution. The dash lights up at the same time as the brakes fail.

Corrective Action:

The computer lights up dash reducing power and taking the trailer brakes away. This almost caused a wreck when the truck shut off and the brakes failed. This truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure. Glenn Polk Chevrolet in Sanger has been working on this since the truck was new. Also we have case open with General Motors without resolution. The dash lights up at the same time as the brakes fail.

Additional Notes:

The computer lights up dash reducing power and taking the trailer brakes away. This almost caused a wreck when the truck shut off and the brakes failed. This truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure. Glenn Polk Chevrolet in Sanger has been working on this since the truck was new. Also we have case open with General Motors without resolution. The dash lights up at the same time as the brakes fail.

Manufacturer: GMC
Mfg Campaign: 11418617
Notice Date: May 26, 2021
Recall Date: May 26, 2021
General Motors, Llc
Campaign: 11418621 Other
May 26, 2021
Defect Description:

ELECTRICAL SYSTEM

Potential Consequences:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Corrective Action:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Additional Notes:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Manufacturer: GMC
Mfg Campaign: 11418621
Notice Date: May 26, 2021
Recall Date: May 26, 2021
General Motors, Llc
Campaign: 11418621 Other
May 26, 2021
Defect Description:

SERVICE BRAKES

Potential Consequences:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Corrective Action:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Additional Notes:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Manufacturer: GMC
Mfg Campaign: 11418621
Notice Date: May 26, 2021
Recall Date: May 26, 2021
General Motors, Llc
Campaign: 11418621 Other
May 26, 2021
Defect Description:

ENGINE

Potential Consequences:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Corrective Action:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Additional Notes:

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn Polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with General Motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

Manufacturer: GMC
Mfg Campaign: 11418621
Notice Date: May 26, 2021
Recall Date: May 26, 2021
General Motors, Llc
Campaign: 11418543 Other
May 25, 2021
Defect Description:

SERVICE BRAKES

Potential Consequences:

The computer malfunctions. It is available for inspection. The computer lights up and causes failure in the trailer brakes. Glenn Polk the dealership in Sanger Texas has been working on a fix but has yet to come up with one. I have spoken with General Motors Representatives several time trying to resolve the problem without result. I also emailed the CEO last Friday and have heard nothing. There were no warning lights until seconds before failure.

Corrective Action:

The computer malfunctions. It is available for inspection. The computer lights up and causes failure in the trailer brakes. Glenn Polk the dealership in Sanger Texas has been working on a fix but has yet to come up with one. I have spoken with General Motors Representatives several time trying to resolve the problem without result. I also emailed the CEO last Friday and have heard nothing. There were no warning lights until seconds before failure.

Additional Notes:

The computer malfunctions. It is available for inspection. The computer lights up and causes failure in the trailer brakes. Glenn Polk the dealership in Sanger Texas has been working on a fix but has yet to come up with one. I have spoken with General Motors Representatives several time trying to resolve the problem without result. I also emailed the CEO last Friday and have heard nothing. There were no warning lights until seconds before failure.

Manufacturer: GMC
Mfg Campaign: 11418543
Notice Date: May 25, 2021
Recall Date: May 25, 2021

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