GMC Sierra Complaints

15,732 consumer complaints on file.

#11771745October 16, 2026
POWER TRAIN
Engine died while on the freeway. Had the truck sent to my dealer via flatbed with AAA. They diagnosed it as the known lifter issue—lifter broke and metal went into the camshaft and scored it. So I need to replace the camshaft and lifters. They’re quoting me $12k for that. I have 83000 miles on this car and I take very good care of it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771757October 16, 2026
SERVICE BRAKES
Brakes make a flutter noise and pedal becomes hard while in drive through line or at a red light or any place that requires constant brake application for an extended period of time
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771423October 15, 2026
UNKNOWN OR OTHER
Rear sliding window leak. Water stains on head liner unsure of addition damage.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771425October 15, 2026
ENGINE, POWER TRAIN, SERVICE BRAKES
On 10/15/2026 I was making a slow right-hand turn up a slight incline into a parking lot when the vehicle braked very hard and the transmission made a grinding noise. I looked at the dashboard, and it was showing that the truck shifted into park while I was driving. The electronic brake engaged as well. I tried putting the truck back into drive, but it would not go into drive. On the dash there was a Service Transmission warning. The push to start engine button still had the green LED on as if the vehicle was running. I pushed the start engine button and the engine started (I didn't realize until now that the engine had shut off). At this point the truck would shift into drive. Another point of note is that I had turned off the Auto Stop feature. I do this every time I start my trip. The truck will be looked at on 10/16/2026 by the dealership. I did report the problem to the service department of the dealership. This incident was the first time it ever happened and there was no warning.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771455October 15, 2026
ENGINE
The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at 45 MPH, the vehicle experienced a total loss of motive power. The vehicle was towed to the dealer, where it was diagnosed, and the contact was advised that the engine had failed and needed to be replaced. The vehicle was not repaired due to the cost of repair. The manufacturer was notified of the failure. The failure mileage was 164,696.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771467October 15, 2026
ENGINE
The contact owns a 2021 GMC Sierra. The contact stated that while driving at 60 MPH, a reduced power mode warning message unexpectedly illuminated, and the vehicle unexpectedly entered limp mode. The contact stated that the temperature gauge indicated a high temperature and the vehicle was overheating during the failure. The vehicle was taken to the dealer, where it was diagnosed that the control valve had failed and needed to be replaced. The vehicle was not repaired. The dealer informed the contact that this was a known failure and escalated the issue to the manufacturer for further assistance. The contact stated that the failure was associated with Technical Service Bulletin (TSB) N252508340 and believed the repair should have been covered under warranty. The manufacturer was made aware of the failure via telephone and website. The contact was also referred to NHTSA for further assistance. The approximate failure mileage was 110,900.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771297October 15, 2026
ENGINE
Driving down road started to hear a weird growling knocking sound and noticed a reduction of power. also noticed lower then normal oil pressure. Changed oil found metal shavings in the oil. sent to chevy dealership. Diagnosed "rod bearing failure" needs new engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771343October 15, 2026
STRUCTURE:BODY:HOOD
The contact owns a 2024 GMC Sierra 1500. The contact stated that while driving at 65 MPH, the message "Service Safety Restraint Device" was displayed. The vehicle was taken to a dealer, where it was diagnosed that the front grille needed replacement. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that a recall would not be issued. The failure mileage was approximately 55,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771040October 14, 2026
VISIBILITY
The contact owns a 2020 GMC Sierra 1500. The contact noticed an abnormal odor inside the vehicle. Upon inspection, the contact observed that the roof, rear seats, and rear carpet were saturated with water. The vehicle was taken to the dealer, where the contact was informed that the rear sliding window frame connected to the roof was fractured, causing water to leak into the vehicle. The contact was informed that the failure was a factory defect associated with an unknown recall; however, the VIN was not included. The manufacturer was notified of the failure by phone and referred the contact to the dealer. The contact was advised that the repair was not covered because the VIN was not included in the recall. The failure mileage was approximately 90,320.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771080October 14, 2026
EQUIPMENT:ELECTRICAL:INFOTAINMENT
The contact owns a 2025 GMC Sierra 1500. The contact stated that during vehicle startup, the infotainment system displayed a blank screen and produced no audio volume. The failure also occurred while driving. The contact associated the failure with Preliminary Information Bulletin: PIT6362, which addressed software-related infotainment and radio anomalies. The dealer was contacted. The manufacturer was notified of the failure by phone. The failure mileage was approximately 4,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771106October 14, 2026
ENGINE, FUEL/PROPULSION SYSTEM, UNKNOWN OR OTHER
1. What component or system failed or malfunctioned, and is it available for inspection upon request? The failure involves the NOx emissions control system, specifically NOx Sensor #2 and the associated NOx catalyst/DPF assembly. Diagnostic trouble codes P11D5, P14D4, P22A1, P2832, P2833, and P28AF confirm abnormal NOx readings caused by sensor breakdown and catalyst performance degradation. Yes, the components are available for inspection at the servicing GM dealership. 2. How was your safety or the safety of others put at risk? A malfunctioning NOx sensor and catalyst can cause the vehicle to enter reduced‑power or limp‑mode operation, which may limit acceleration or speed unexpectedly. This can create hazardous situations during highway merging, passing, towing, or maintaining speed in traffic. Additionally, improper emissions control can lead to engine performance irregularities that may affect vehicle responsiveness. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The issue has been confirmed by a GM dealership through diagnostic testing. The dealer verified all fault codes and confirmed the NOx sensor failure and abnormal catalyst readings. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle has been inspected by GM‑certified dealership technicians. No inspections have been performed by police, insurance representatives, or other third parties. 5. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? Yes. The check engine light and emissions‑related warnings appeared around 80,000 miles, coinciding with the emissions warranty limit. Diagnostic trouble codes related to the NOx system were present, and the vehicle exhibited abnormal emissions readings consistent with sensor and catalyst malfunction.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771170October 14, 2026
AIR BAGS
air bags warning
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771269October 14, 2026
STRUCTURE:BODY
While driving at highway speeds the upper front grill part of my gmc sierra truck simply flew off. It went airborne and flew behind me causing traffic directly behind me to swerve out of the way into other traffic lanes to avoid missing the grill piece from hitting them. There was no indication of the part being loose or rattling or any warning. It simply just flew off. This could have easily caused an accident or flew into my windshield and cracked it as well. This needs to be investigated. This is a common gmc sierra 2022+ body style issue as I have heard from other owners experienced the same thing.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770786October 13, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle suddenly entered Limp mode without warning. The vehicle was taken to the dealer, where the computer was reflashed and the vehicle temporarily returned to normal operation; however, the failure recurred and the vehicle was returned to the dealer. The contact noticed a burnt odor coming from the engine compartment, along with engine bay cooling fans running at an unusual rate. Upon further inspection, the dealer diagnosed the failure as a defective coolant valve. The contact associated the failure with GM Special Coverage TSB N252508341; however, the VIN was not included in the coverage program. The manufacturer was notified of the failure. The failure mileage was 107,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770798October 13, 2026
ELECTRICAL SYSTEM
Since I purchase this truck I've been having no audio twice a week. Dealer has no fix GMC knows they have issues and still they are selling this vehicles. Took a trip to [XXX] a storm was moving in and we had no audio to alert us I also believe with no audio we have no blinkers we almost cause an accident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770824October 13, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2024 GMC Sierra 1500. The contact stated that while driving at 70 MPH, the vehicle unexpectedly started shaking and losing power until it completely stalled. The check engine warning light started flashing, and the warning messages "Service ESC" and "Service Traction Control" were displayed. The vehicle was towed to the dealer. The contact discovered that the engine had previously been replaced by the dealer at 46,370 miles under NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling) under the prior owner; however, the failure recurred. The contact associated the failure with the safety recall. The dealer was contacted regarding the issue. The failure mileage was approximately 70,172.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770868October 13, 2026
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
2021 GMC with 6.2L motor. The engine begin to produce a clattering noise in the upper part of the engine. When the clattering happens the vehicle will shudder. I took the vehicle into a certified independent service center who diagnosed a catastrophic engine failure as a result of lifter and camshaft bearing failure. They further advised that this year of vehicle (2021) and engine (6.2L) was known to have this defect and might be subject to a safety recall. I contacted GM customer service who stated that my VIN was not included in the recall even though the year and engine matched the recall. I found that to be odd especially when I noted that nearly 600K vehicles matching my failed engine was recalled. She stated that I (owner) had to bear the cost of replacing the defective engine and labor. I had to have my vehicle transported from [XXX] to [XXX] at the cost of 1400 dollars. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770888October 13, 2026
ELECTRICAL SYSTEM
The contact works for a company that owns a 2023 GMC Sierra 2500. The contact stated that the vehicle experienced intermittent electrical failures. While driving, the vehicle stalled upon acceleration, followed by a total loss of electrical power. The vehicle was towed to a dealer for inspection; however, the failure could not be duplicated. The failure mileage was 177,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770894October 13, 2026
POWER TRAIN
The contact owns a 2020 GMC Sierra 2500. The contact stated that while stopped at a traffic light and making a left turn at approximately 20 MPH, the transmission failed. The vehicle was unable to exceed 10 MPH. The check engine warning light illuminated, and a dinging sound was heard following the incident. The vehicle shifted erratically, jumped gears, and made unusual noises. The contact associated the failure with NHTSA Campaign Number: 24V797000 (Power Train). The vehicle was towed to the dealer for diagnosis. The dealer confirmed an internal transmission failure and clutch lockup, with DTC P2732. Additionally, the transmission fluid was burnt and contained metal shavings. The dealer contacted General Motors after informing the contact of the repair costs. The failure mileage was approximately 107,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770508October 12, 2026
POWER TRAIN, FUEL/PROPULSION SYSTEM, ELECTRICAL SYSTEM
The Fuel pump modular system failed leaving me unable to start the vehicle and left me stranded in the [XXX] heat for hours. The vehicle only has 57k miles. There was a recall for this specific issue for many GM vehicles but not mine. There was no warning! It has been towed to Sheehan Buick in [XXX] and diagnosed as the Fuel pump Modular system but I am being told it is not covered under the recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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