GMC Sierra Complaints

15,732 consumer complaints on file.

#11698136November 7, 2025
POWER TRAIN
The original engine (6.2L L87) had to be rebuilt by GM because of lower engine knocking in June 2024, with 57,873 miles. The rebuilt engine had to be replaced with a remanufactured engine in October 2024, but had to wait until the completed work in December 2024. The remanufactured engine started knocking, and that engine was replaced in October 2025. All part of the L87 6.2L engine failures. Problem documented by dealerships. Components were brought to GM's attention. No warning lights or messages - just lower engine knock.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698140November 7, 2025
ENGINE
It is the same issue with 2021-2024 6.2L engines that have already been recalled. I have to replace lifters and cam because of the issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698192November 7, 2025
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
ECM - Engine System code P0700 and TCM - Transmission System code U0073. The truck went in to first gear and wouldn't go over 5 MPH on the highway. The dealer is saying it can't be replicated but it's happened multiple times to the vehicle in the past week. The truck was taken to the dealership and inspected but they claim nothing is wrong. The check engine light came on as well as the aforementioned codes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698208November 7, 2025
ENGINE
At approximately 54,000 miles had a complete engine failure. Lifter blew apart and damaged crank shaft. Complete engine rebuild. Rebuilt in approximately 3 weeks. 2022 At approximately 138,000 miles had another complete engine failure. Lifter blew apart again, Entire engine was replaced. New engine took 10 weeks to get. Installed in 2 days after recieved. 2025 No symptoms or warning lights present prior to failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698271November 7, 2025
POWER TRAIN
transmission locked up 8 times from 1,050 miles to current 3,885 miles. It has happens each time around 40 mph. Each time it’s like hitting the brakes. The 8th time it locked really hard like slamming on the brakes. I’m worried with winter months what will happen on snow/ice covered roads. Called dealership and was told GM refuses to do anything until it completely fails. It seems they know what the problem is but refuse to fix till the truck stops moving during complete failure. No warning lamps and dealer ship says they can’t replicate it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697913November 6, 2025
ELECTRICAL SYSTEM
After driving my truck, once I park and turn the truck off it will not shut down electronically due to an error on the dash display that reads “shift to park”. Sometimes I have to mess with the gear shifter when the truck is in park to get it to register that it is parked and shut down completely. It can take up to 15 minutes sometimes to shut down.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697915November 6, 2025
ENGINE
Engine knock, loss of power, engine failure warning, ticking
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697942November 6, 2025
ENGINE, FUEL/PROPULSION SYSTEM
While stopped at traffic signal, vehicle suddenly stops running. Restarted vehicle and had to feather the throttle to keep it running. Engine began to run normally so I continued driving. When I reached approximately 35 mph, a loud rattling noise started and experienced a severe loss of power. Fortunately I was able to safely get out of the traffic lanes to the side of the roadway. I inspected the vehicle, no oil leaks, no coolant or transmission leaks. No warning indicators on the dash. Oil pressure normal. Temperature normal. I limped the vehicle home to be towed to dealer. Approximately 2 months ago this vehicle passed the recall inspection and had the recommended oil change. There was a previous warranty repair performed on a stuck exhaust valve in the #8 cylinder. The vehicle was also brought in to the dealer for suddenly cutting off while driving approximately 50 mph. Again I was able to pull off safely. The vehicle then started normally and I proceeded to drive. The dealer inspected the vehicle and could not replicate the issue, and found no electrical or mechanical trouble codes. There were absolutely no warning indications prior to each of these events.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697543November 5, 2025
ELECTRICAL SYSTEM, POWER TRAIN, FUEL/PROPULSION SYSTEM
Coolant control valve and engine cooling fan
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697699November 5, 2025
ENGINE
My GMC dealer falsely reported that recall work was completed on my engine but it was proven by an independent service center that it was not done. Items that have been proven to have not happened were 1. Replace engine oil with higher viscosity oil, 2. Replace oil filter to match new oil, 3. New oil fill cap labeled with oil type, 4. New insert for owner's manual. The way I initially learned the work was not completed was by warnings on my dash about low oil pressure and low oil level in my engine this past weekend. The independent service center provided confirmation that the invoice from my GMC dealer was falsified and that the work they stated was completed was not done. As a result of the failure to complete the work, my engine ran on insufficient oil and, based on the dirtiness of the oil in my engine, it compromised its condition.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697413November 4, 2025
ENGINE
Took the vehicle to the dealer because of an engine noise. It had issues with the valves knocking when it had around 1000 miles. I took it in and now the truck has around 67,000 miles and I’m being told it needs a new engine because of a bent rod in the engine. I was told that I need a new engine. Previously I had a lot of other issues with the front wheel hubs clicking. But, this truck didn’t even make it to 5 years and now it needs an engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697435November 4, 2025
AIR BAGS
Early October my passenger side airbag deployed and I was sitting in the drivers seat and had just put the key into the key hole but did not turn the key to start the vehicle. 3 weeks later I was going into the passenger side of the vehicle and the key was in my pocket and the drivers side airbag deployed. Both times the vehicle was not started and the airbags deployed I called GMC and they had the vehicle towed to a dealer to investigate why the airbags deployed. They said it was a sensor that was corroded and that’s why the airbags deployed. I asked GMC, why didn’t the sensor left the driver know that it was going bad, just like it notifies the driver if you have low tire pressure or needs an oil change. I had no notifications that the airbags were going to deploy. I’m so grateful that no one was driving the vehicle when they deployed. GMC said the vehicle is not safe to drive so they had it towed from my house to the dealership and then back to my house however they said they are not taking responsibility for the deployment and said it’s my responsibility to get the airbags fixed. I told GMC that I was filing a complaint with you all. Thank you for looking into this matter.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697439November 4, 2025
ENGINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, several unknown warning lights illuminated, and the engine seized. The vehicle was taken to an independent mechanic, where it was diagnosed with a misfire in cylinder #3 and engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact referenced an unknown recall with a similar failure; however, the VIN was not associated. The manufacturer was not made aware of the failure. The failure mileage was approximately 101,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697457November 4, 2025
ENGINE
The contact owned a 2024 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The contact stated that while driving at 16 MPH, the engine suddenly stalled. No warning lights were illuminated. The contact was able to restart the engine, placed the gear lever on neutral(N), and revved up the engine. The contact then moved the gear lever to drive(D); when the vehicle accelerated independently, the contact swerved to avoid hitting a telephone pole, then swerved to avoid hitting a mailbox, and ended up hitting a tree, where the vehicle came to a stop. The driver-side and passenger-side air bags. A police report was filed. The contact sustained minor injuries to his foot. No medical attention was provided. No passengers in the vehicle. The vehicle was towed to a collision center. The vehicle was not inspected. The insurance company was notified. The manufacturer was made aware of the failure and pending an investigation. The failure mileage was approximately 25,000.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11697489November 4, 2025
ENGINE
While driving at highway speed and attempting to pass another vehicle, I experienced an engine failure; loss of power, noise from engine, and numerous warning messages on the display. At the GM dealer, I was informed that a pushrod (cylinder #2) was bent, the source of the engine noise. Upon further inspection (removal of cylinder heads), it was determined that the cam shaft chrome had begun to flake causing pitting (lobe damage) which in turn caused the pushrod to fail. Had the pushrod broke instead of bent at highway speed, I feel there would have been a catastrophic failure with more severe consequences for my vehicle and others around me. Vehicle was diagnosed and repaired by a certified GM dealer. There were no prior warnings/indications of problem(s). I understand there is a current recall of the GM 6.2L L87 engine for model years 2021-2024. This incident occurred on a model year 2020 GM 6.2L L87, but the issues I experienced are identical to the 2021-2024 engines identified in the recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697320November 4, 2025
ENGINE
Driving at night when the low oil light came on then engine failed. Engine is now blown and will not run. Engine L87.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697176November 3, 2025
POWER TRAIN
Transmission experiences shuddering while accelerating. Impact on driving performance which is a safety issue. Problem has been confirmed by the dealer. No warning lights are present during this problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697185November 3, 2025
ENGINE
My truck had a ticking, knocking on the bottom end of the engine as I was driving home with my children. When i pulled into my driveway, the low oil pressure light came on and the truck began to stall while the back of the truck was till in the roadway. Several cars had to come to a complete stop to avoid hitting us, right where my children were seated in the back. I was able to limp the truck into my driveway. The following day I attempted to start the truck. It started hard and immediately gave me a low oil pressure light. I shut the truck off and called the dealership. The dealer wanted $3000 to just diagnose the problem. I had to pay out of pocket to get the truck towed to a private shop. The private shop started the truck and attempted to drive it to reproduce the issue. The truck engine seized and I had to pay to have it towed back to the shop. I then had to purchase a brand new crate engine from GM and pay to have it installed. The seized engine would not even roll over, so the cost of labor was increased due to them not being able to unbolt the torque converter on the engine. My engine is a 6.2l and GM told me based on by truck being a 2019, that it was not included in the recall. So far, the engine replacement has cost me $19,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697296November 3, 2025
ENGINE
Took truck in for recall on sept. 19th, it passed and oil was changed per recall. On Nov 1, driving on IH 20. engine oil pressure went to 0 and engine stopped. The dash showed that oil pressure was low and to pull over vehicle. I was going 75 mph at time. Pulled to emergency lane and engine died. Had to tow to dealer. It was very unsafe due to speed and traffic on highway. At no other time was there any indication of engine problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697309November 3, 2025
ENGINE
I own this 21 GMC Sierra with a 6.2L. This vin is not part of your current recall. But my truck is at a dealership waiting on a replacement engine. I was told that the engine locked up in the bay. Not sure if any lights came on before the engine failed, the dealer did not go into that much of detail. The truck is sitting outside waiting on the engine, not sure if gm made then do any failure analysis or just said its a 6.2 were sending an engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra