GMC Sierra Complaints

15,732 consumer complaints on file.

#11649046March 18, 2025
ENGINE
ENGINE FAILURE. CAM BEARINGS FAILURE. ENGINE SEIZED UP. SAFETY ISSUE: TRAVELING ON HIGHWAY TOWING A FISHING BOAT. PULLED OFF FOR FUEL. ENGINE COMPLETELY SEIZED UP WHILE AT GAS PUMP. IF IT HAD IT SEIZED UP BEFORE PULLING OFF HIGHWAY FOR GAS, GREAT RISK FOR A CATASTROPHIC CRASH, ESPECIALLY WHEN PULLING A BOAT TRAILER. ALL SYSTEMS INCLUDING STEERING SHUT DOWN. JOHN JONES CHEVROLET DEALERSHIP IN SCOTTSBURG INDIANA RAN DIAGNOSTICS AND CONFIRMED COMPLETE ENGINE FAILURE. FAULTY CAM BEARINGS SEIZED UP. ENGINE IS RUINED AND MUST BE REPLACED. INSPECTION BY JOHN JONES CHEVROLET DEALERSHIP. WE HAD BEEN ON THE HIGHWAY FOR 3.5 HOURS WHEN PULLED OFF FOR GAS. THERE WERE NO WARNING SIGNS. NO CHECK ENGINE LIGHTS, NO LIGHTS AT ALL ON THE DASH. NO UNUSUAL SOUNDS OR SMOKE. NOTHING UNUSUAL BEFORE THE ENGINE SEIZED UP.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11649082March 18, 2025
POWER TRAIN
The contact owns a 2018 GMC Sierra 1500. The contact stated that while attempting to accelerate from a stop, the vehicle failed to accelerate while depressing the accelerator pedal. No warning light was illuminated. The vehicle was taken to a local dealer, and the transmission was repaired under warranty. The contact stated that a year after the repair was completed, the failure reoccurred. The vehicle was not repaired after the most recent failure. The manufacturer was made aware of the failure. The failure mileage was approximately 94,600.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11649146March 18, 2025
ENGINE
The truck had been parked for about 4 hours, after a 250 mile trip. I cranked it and started driving to return home. I heard an intermittent squealing noise while driving. I had driven only about 2 miles when the engine suddenly shut down in heavy traffic on a four lane divided highway. I managed to get the truck into the median and stop. I was left stranded in the middle of the highway. It turns out the the engine bearing went bad and ruined the engine. I will now have to replace the engine at a cost of about $15,000.00. This is a safety concern when the engine suddenly failed and stalled while driving on a four lane divided highway, in heavy traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648677March 17, 2025
STRUCTURE:BODY
N242490120 is applicable for 2022 models but my 2023 also had the same problem; The grille upper cover broke at the taps and detached from the grille structure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648678March 17, 2025
POWER TRAIN, ENGINE
Motor blew up while driving down the road. Had to replace motor on 08/23/2023 at about 116,000 miles. Left me and my family stranded in the middle of no where. Was going around 60 miles an hour and when passing someone got up to 71 mph and then motor blown push rod bent. Transmission issues. Hesitation when switching from park to drive/ reverse. Takes at least 40 seconds and when you accelerate it will jerk so hard. Will lunge forward very sudden and sometimes even when coming to a stop at a stop sign. This happens almost every day.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648687March 17, 2025
ENGINE
Driving down the road dash lit up to push start and truck shifted in to neutral. Pulled off the road and put in park. Engine would not start again. Dash kept lighting up with push start, turning off non essential to preserve battery. Called tow truck. They tried jumping, not the battery. Had to drag the vehicle on the flat bed because could not put in neutral. Drag and drop off the flat bed at the dealer. That was Friday. On Monday got the call the engine had seized. 34k miles Had just returned from a 2k mile trip with construction zones down to one lane and nowhere to pull off. Glad it didn’t happen there!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648694March 17, 2025
VISIBILITY/WIPER
The truck bed cover is not secure, it fits in via a channel with no straps or other protections and so when driving on the highway, it flies off from the connection to the cab and you can’t see behind you. It then smacks into the car until you can pull over. There is no protection against this.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648711March 17, 2025
ENGINE, POWER TRAIN
With out any warning the truck stop running at stoplight an would not start back up. We could not move the truck out of the road and blocked traffic for almost 1 hour waiting for the tow truck and getting it loaded on the tow truck (truck would not go in to neutral). The truck is now at the Dealer and they are saying that the engine seized up and will need replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648735March 17, 2025
POWER TRAIN
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving approximately 75 MPH, the rear wheels locked up. The failure had occurred on several occasions. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to a dealer where it was diagnosed and determined that a software update was needed. The vehicle was repaired under an NHTSA Campaign Number: 24V797000 (Power Train); however, the failure persisted. The manufacturer was not notified of the failure. The failure mileage was approximately 35,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648750March 17, 2025
ENGINE
The engine, while driving down the road, incurred a failure to the pusher rod in the #5 cylinder. This occurred at 6750 total miles on engine. Engine failure was repaired by a dealership. The failure occurred again at 99,500 miles to the same #5 cylinder causing major engine damage leading to the replacement of the engine. Our safety was put at risk as the truck decelerated and began vibrating. The second failure occurred and the engine shutdown. These incidents occurred without warning, Yes, a dealer was involved in both incidents. Only a dealership has been involved. The warning occurred after the failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648752March 17, 2025
POWER TRAIN
Transmission not shifting correctly. Have had the recall software update. Two new valve bodies and still not shifting correctly. Transmission is known to lock up.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648765March 17, 2025
POWER TRAIN
I believe the torque converter failed and resulted in the transmission starting to fail. It still goes down the road but shudders when slowly gaining speed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648853March 17, 2025
POWER TRAIN
While driving I experienced a loss of forward momentum, and watched the RPMs go up to 3000, wording came on the dash, but I was in traffic and wasn't able to read. I was able to reach next light about 1/4 mile, and stopped. Mad a left turn and within 200 feet, same issue. I pulled over and called OnStar. Towed to dealer. Dealer put on lift right away, as it was just in for 1st service on Saturday, with 4775 miles. Dealer informed me of a bulletin out for removing transmission pan, and splitting plates to check a ball size for 6th gear, which they found during the computer diagnostic checks. They claim to have a part tomorrow, and will install soon after.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648882March 17, 2025
ELECTRICAL SYSTEM
Having issues with inner tailgate opening on its own and items falling out of bed/box onto road!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648892March 17, 2025
ENGINE, ELECTRICAL SYSTEM, POWER TRAIN
Truck just made a year old and killed on me in the middle of road. They are saying I need a new engine and maybe transmission. Could not shift truck into neutral, which left me stranded on busy road. For unsafe and had me nervous. Trying to get GMC to buy me out of this vehicle. Had same problem with 6.2 liter prior to this truck. Engine and transmission was replaced. They promised if I bought new truck, I wouldn’t have the issues and here I am again. This is terrible.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648615March 16, 2025
ENGINE
Stalled while driving 3 weeks ago, was able to restart. Last Monday it died again on a shorter trop to store, it wouldn't restart. 3 days later, after having to go to Dealership was told engine 6.2L engine is being replaced. Potentially crankshaft bearings failing at 55,315 miles on it
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648547March 16, 2025
POWER TRAIN
6 SPEED AUTO TRANSMISSION ISSUE WITH SHUTTERING AND WILL INTERMITTINGLY SOUNDS LIKE WHEN YOU DRIVE OVER THE GROVES ON THE SIDE OF THE HIGHWAY AND SOMETIMES HARD SHIFFTING BETWEEN LOWER GEARS . IT HAS SAME ISSUE AS BEING ALREADY REPORT WITH GMC TRANSMISSION . I HAVE TAKEN TRUCK TO LOCAL BUICK DEALERSHIP AND HAVE THEM FLUSH FLUIDS AND REPLACE FILTER . ISSUE HAS REACCURRED . TRANS DOES NOT SLIP FORWARD OR REVERS .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648558March 16, 2025
ELECTRICAL SYSTEM
Multi functional tail gate will open on its own while driving. I have had this repaired by gm 3 times and still have issues. This problem is currently on the recall list for 2500 hd series trucks and the 1500 series trucks in Canada but not on recall in united states. This problem poses a life threatening problem while on the road due to contents of truck possible becoming projectiles to other drivers due to tailgate opening on its own .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648442March 15, 2025
AIR BAGS
Airbag system did not deploy but smoke in cabin during a crash. Video of front, rear and inside cabin shows the rear end passenger side impact at an estimated 45-50 MPH. I saw smoke in cabin, disturbed with anxiety after crash waiting for bags to deploy accidentally. The airbag deployed red light illuminated notifying an airbag deployment. I received a GM message through the vehicle report application stating that my airbag system malfunctioned and I needed to take the vehicle to a service department for repair as soon as possible. This crash was a total loss of the GMC Sierra, this was how hard the vehicle was hit. Why did the airbag system smoke? Why did the airbags not deploy? Why did I receive a Malfunctioning Airbag system message from GMC? Video shows that if the airbag system would have deployed on the steering wheel I would have had less head and neck trauma when whipping backward and then forward.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11648450March 15, 2025
ENGINE, POWER TRAIN
valve train/camshaft fairlure which damaged entire engine - happened at 99,650 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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