GMC Sierra Complaints

15,732 consumer complaints on file.

#11764642September 16, 2026
ENGINE
At around 1,500 miles the truck reduced power. I was able to drive it to the dealership. The dealership reported the lifters had failed and it would be 5-6 months to repair because of the parts shortage.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764644September 16, 2026
ENGINE, ELECTRICAL SYSTEM
The contact owns a 2026 GMC Sierra 1500. The contact stated that while driving 35 MPH, the vehicle stalled. Additionally, the wheels locked up, and transmission made a screeching sound. The contact was able to restart vehicle after approximately 5 minutes. The failure was recurrent. The vehicle was towed to the dealer, but the dealer was unable to duplicate the failure. The dealer replaced an unstated module that was damaged during the failure. The manufacturer was contacted by phone and was made aware of the failure. The failure mileage was approximately 6,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764674September 16, 2026
LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at various speeds, the tailgate opened independently. The failure occurred several times and became more persistent recently. The contact stated that while the vehicle was parked in the driveway, the side marker lights started flashing, and the tailgate opened. Additionally, upon exiting a store, the contact discovered that the tailgate had opened while the vehicle was parked. The dealer and the manufacturer were notified of the failure and confirmed that the VIN was not included in a recall. The failure mileage was approximately 66,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764687September 16, 2026
VEHICLE SPEED CONTROL, FUEL/PROPULSION SYSTEM
The truck shut off and would just crank. It threw the code P129F. And wouldn’t start up until after 15 minutes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764703September 16, 2026
POWER TRAIN, COMMUNICATION:MANUFACTURER TELEMATICS
The contact owns a 2026 GMC Sierra 1500. The contact stated that while hauling a trailer and making a left turn at 5 MPH, at a busy intersection, the message "Shift to Park" displayed, and the vehicle lost motive power. The vehicle was restarted. The contact stated that the failure was persistent. The local dealer was notified of the failure by phone. The vehicle was taken to the dealer, where it was diagnosed that the telematics module had failed and needed to be replaced. The vehicle was repaired. The failure mileage was approximately 3,900.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764783September 16, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle came to a full stop to allow wildlife to cross the road. Upon accelerating, the engine made an abnormal banging noise. The contact stopped to inspect the vehicle and observed an engine misfire while idling. The vehicle was towed to the residence, where an independent mechanic diagnosed that the lifters had collapsed, and that the engine needed to be disassembled for further diagnostic testing. The failure mileage was approximately 159,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764802September 16, 2026
POWER TRAIN, ELECTRICAL SYSTEM, ENGINE
driving down the road going to and intersection the dash says I received a Service ESC message followed by a Reduced Acceleration warning on the center display. I also had the forward collision, traction control and check engine lights come on. I also noticed the shudder/jerk. The truck is giving a P060C code and when i was driving it dies in the intersection of the road and will not start back up. puts the computer in a safety mode. I have call my local GM dealer and they did not fix it and it happen twice. I the truck dies in the middle of the road and no way to start's it and if a big rig crashes in to the truck some one or more than one will be hurt or killed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764851September 16, 2026
POWER TRAIN, SUSPENSION
Unknown
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764349September 15, 2026
LANE DEPARTURE: WARNING
Super cruise was engaged on I-95 and attempted a lane change. Another vehicle was in a position along side my vehicle that would have resulted in an accident if I had not noticed it and manually grabbed the steering wheel to override the super cruise. I have an appt with the dealer next week. The vehicle is also is occasionally displaying a "service driver assistance system" message
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764358September 15, 2026
ENGINE
Catastrophic engine failure. A 2026 GMC Sierra with only 7360 miles had engine failure while driving at 45 miles per hour which resulted in no power from the engine to assist in getting the truck off the road and stopped safely out of the road. In my case, it happened late at night so traffic wasn't an issue. I was just stranded in a dark, rural area late at night. If this happens to someone in traffic, the results may be much different from mine. After this incident, I learned that this is not uncommon and many trucks/SUVs with the GM 6.2L engine have failed in the same or a similar manners and earlier models have been recalled for the same issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764362September 15, 2026
POWER TRAIN, ENGINE, ELECTRICAL SYSTEM
5/5/25 woke up back seat entire truck flooring soaking wet back glass cracked. 4/8/25 transmission went out 117,000 miles 7/3/25 exhaust leak and placed nox 1. 7/8/25 127551 mileage exhaust leak replace gaskets, belt , tensioner, and pulley, 6/8/2025 3 knock sensors replaced and replaced intake manifold.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764382September 15, 2026
STRUCTURE:BODY, UNKNOWN OR OTHER
The upper chrome grille molding fractured at the clips and completely detached at highway speeds, creating a dangerous flying projectile. This is an identical material failure to NHTSA Campaign 25V-060. The defective part or assembly process clearly extends into the 2023 model year.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764385September 15, 2026
ENGINE
Timing in engine is going out at 150,000 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764419September 15, 2026
STRUCTURE:BODY
I request that GM and NHTSA investigate whether recall N242490120 / NHTSA recall 25V060 was properly performed and effective, determine why the deflector detached, and assess whether improper installation, defective parts, inadequate fastening, impact, road debris, or another cause was responsible. Evidence and Records Requested Please review or provide: • Complete recall-repair records, including repair orders, technician notes, procedures, parts and fastening specifications, photographs, repair date and mileage, personnel identities, and attachment-point inspections. • An explanation for the discrepancy between the April 18, 2025 myGMC date and April 28, 2025 GM VIN-lookup date. • Dealership inspection findings, photographs, measurements, and conclusions. • GM repair instructions, technical guidance, recall-validation records, and engineering analyses. • A written determination of the probable cause and whether this was a remedy failure, improper installation, defective part, unrelated damage, or unresolved cause. • Criteria for determining whether the grille must be replaced or repaired. • Warranty, goodwill, claim, technical-assistance, and customer-service records. • Similar complaints, warranty claims, field reports, damage reports, and recurrence data. Corrective Actions Requested I request that GM identify the cause, determine whether the grille must be replaced, and assess whether the attachment can be repaired. If the incident resulted from the recall condition, repair, improper installation, defective parts, or failure of the remedy, I request no-cost repair or reimbursement, including grille replacement. If GM attributes the incident to unrelated damage or an external event, I request the supporting evidence and technical basis. I request that NHTSA determine whether additional oversight or corrective action is warranted to prevent recurrence and road-debris hazards.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764465September 15, 2026
TIRES
The contact owns a 2026 GMC Sierra 1500 equipped with Bridgestone Tires, Tire Line: Dueler A/T, Tire Size: 275/60/R20, DOT Number: 17XW09K63. The contact stated that the sidewall around the bead of the four tires were cracked. The tires were dry rotted. The tires were the original equipment. The dealer was notified of the failure in person. The failure mileage was approximately 13,300.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764474September 15, 2026
ELECTRICAL SYSTEM
The contact owns a 2022 GMC Sierra 1500. The contact stated that the vehicle intermittently failed to start and was jumpstarted on each occurrence. The contact purchased and installed a new battery; however, the failure persisted. The vehicle was taken to an authorized dealer, where it was diagnosed that a corroded ground strap had caused an electrical short to the battery. The dealer replaced the ground strap, and the vehicle was repaired. The contact associated the failure with Customer Satisfaction Program: N252515590; however, the VIN was not included. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764499September 15, 2026
ENGINE
I was driving my truck and I had a sudden loss of power. The engine sounded like a rattle of bolts. It was towed to the dealership and they replaced the engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764558September 15, 2026
ELECTRICAL SYSTEM, VEHICLE SPEED CONTROL
Dashboard keeps returning to aljarir type writing. We bought it with American English but won't stay in English. Monday will be 30 day and I believe the dealer is ghosting me. Y'all have any ideas how to reset the dashboard without replacing the radio??? Closest answer I was given.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764116September 14, 2026
ENGINE
I did not have anyone tell me about recalls concerning my GMC SLT, when can I have what ever it takes to send me info concerning lifters, these have not had any issues yet. Will I have someone to contact me about possible lifter issue. Current miles are 18129. Thanks for your attention. MCG
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764134September 14, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving approximately 55 MPH, the vehicle started losing power and decelerated. The check engine warning light was flashing with several unknown messages displayed. The vehicle was parked on the side of the road and later towed to the local dealer to be diagnosed. The contact was informed that the lifters, push rods, and camshaft had failed and needed to be replaced. The lifters, push rods, and camshaft were replaced, and the vehicle was repaired. The contact stated that approximately 6,900 miles later, the failure reoccurred. The vehicle was towed back to the local dealer, and the contact was informed that the engine crankshaft and connecting rods had failed and the engine needed to be replaced. The vehicle was not yet repaired. The failure mileage was 115,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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