GMC Sierra Complaints

15,732 consumer complaints on file.

#11699236November 13, 2025
ENGINE, UNKNOWN OR OTHER
I was traveling home from work and lost all power to the vehicle while driving. No warning lights, check engine lights came on. I was able to cross traffic and park it in a business place. I had it towed to a chevy dealership for diagnostic. They said that the timing chain came off and i would need a new engine. I had it towed to a auto mechanic shop for a second opinion and they gave the same result. The vehicle is only 4 years old with 92,000 miles on it. When i lost all power to the vehicle, I did not hear any strange noises.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699295November 13, 2025
FUEL/PROPULSION SYSTEM, ENGINE, ELECTRICAL SYSTEM
I am an active U.S. Air Force member. My 2021 GMC Sierra 1500 failed GM Recall N252494003 on Sept 29, 2025 (L87 engine loss of propulsion). GM states this defect can cause sudden engine failure and loss of propulsion, increasing crash risk. Despite the confirmed failure, Ocean Cadillac (Miami, FL) told me to keep driving the unsafe vehicle and refused all Courtesy Transportation. The Service Manager admitted in writing that the engine failed, the defect can cause loss of propulsion, and the replacement engine is delayed under GM National Control for up to 3 months — yet they still denied me a loaner or rental. His statements contradict the GM documents he attached: • GM Bulletin DCS7222 says Courtesy Transportation CAN be provided during L87 recall downtime and dealers MUST consider loaners/rentals. • GM FAQ N252494002 says Courtesy Transportation IS available for this recall. • GM FAQ lists recall symptoms (check engine light, hesitation, high RPM, reduced power) — NOT battery drain. • GM states: “If the engine fails, the vehicle WILL lose propulsion.” Ocean Cadillac ignored these rules and put me back on the road in a known unsafe vehicle. As an American manufacturer, GM has a responsibility to protect American drivers. Their failure to follow recall procedures placed me, my family, and other motorists at risk. I request NHTSA investigate whether GM/Ocean Cadillac are complying with recall safety requirements and whether customers are being told to drive unsafe vehicles after confirmed failures.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698889November 12, 2025
ENGINE AND ENGINE COOLING, ENGINE
The contact owns a 2022 GMC Sierra 1500. The contact stated that while operating the vehicle, the check engine warning light illuminated. The vehicle was taken to the local O'Reilly's, who diagnosed that the cylinder #2 glow plug had failed and needed to be replaced. The vehicle was not yet repaired. The manufacturer and local dealer were notified of the failure and informed the contact that the VIN was not included in the Manufacturer's Special Coverage that was related to the failure. The contact stated that the special coverage service was for the previous model years with a 3.0-liter turbo diesel engine that had experienced the same failure. The failure mileage was 38,773.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698923November 12, 2025
ENGINE
This is a report on an incident that happened a year ago. Vehicle was taken to GMC dealer who replaced the engine at our expense. Seems to be consistent with the problem on newer GMC's that have been covered by a recall. This 2020 is one of three GMC's owned by our company. This expense was in the $12,000 range. (The 2019 experienced similar issues in 2022 and the expense was $2800 ish, and in 2024 another $1200 ish. ) Dash lit up like a Christmas tree, all warning lights on. Stalled, barely moved.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698927November 12, 2025
ENGINE
We were traveling when it went into limp mode slowing our speed way down. We got it to a dealership and they determined low oil pressure and metal in the oil. My vehicle only has 1185 miles on it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698930November 12, 2025
ENGINE
Truck cut out going across the road almost got hit due to the vehicle stalling then about a mile down the road the check engine light came on parked it took it to my mechanic and after the incident it was throwing a cylinder misfire code. Cylinder one when the mechanic got in there was completely shot and I had to have a new motor. No warning no lights could have potentially caused a major accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698989November 12, 2025
ENGINE, ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 25 MPH and making a turn, the vehicle lost motive power. There were several unknown warning lights illuminated after the failure. Upon investigation, the failure was related to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The vehicle was towed to an independent mechanic, where it was diagnosed with lifter failure and camshaft damage. The vehicle was repaired. The local dealer was not contacted. The manufacturer was contacted and opened a case, and referred the contact to the local dealer for assistance. The failure mileage was approximately 86,960.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698822November 11, 2025
POWER TRAIN
Transmission module went out at 20,989 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698523November 10, 2025
ENGINE
Engine ticking especially when cold, dealership claims they fixed it while it was under warranty but it has continued to do it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698528November 10, 2025
ELECTRICAL SYSTEM
The brake controller on trucks error out while towing. Shuts brakes off. Not a good thing towing 16,000lbs down hill. Almost accident. Destroyed my truck brakes and warped rotors. The controller checks the house battery on trailer and if not in range shuts brakes off. The brake towing screen in truck states all is good but there is this tiny little light at gain adjust location that goes off and you do not have brakes but yet your screen states you do. Bad deal.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698575November 10, 2025
ELECTRICAL SYSTEM, UNKNOWN OR OTHER, FUEL/PROPULSION SYSTEM
1. The vehicle’s emissions system is malfunctioning, specifically the ECM (Engine Control Module) related to the exhaust emissions system. The diagnostic trouble code is P2C7A, indicating the system is not performing as expected. Key components such as the NOx catalytic converters and diesel particulate filter have been repeatedly replaced, but the issue persists. The vehicle and all replaced components are available for inspection upon request. 2. The malfunctioning emissions system has led to an exhaust leak that allowed exhaust gases to enter the vehicle’s cab. This creates a hazardous environment for both the driver and passengers, exposing them to harmful exhaust fumes. In addition to reduced engine performance, poorer fuel economy, and emissions non-compliance, this exhaust leak poses a serious safety risk by compromising the air quality inside the vehicle. Prolonged operation under these conditions could lead to adverse health effects and further mechanical failures that impact vehicle safety. 3. Yes. The dealership has diagnosed the problem multiple times. The emissions components have been replaced under warranty on two separate occasions. The dealer attributed the fault to fuel quality; however, Fuel distributor debunked these claims. 4. The vehicle has been inspected extensively by the dealership with invoiced repair work replacing key emissions control components. 5. The check engine light and Service Engine Soon (SES) light have been illuminated with the diagnostic code P2C7A since the initial identification of the problem which started 3JUN24
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698576November 10, 2025
POWER TRAIN
Transmission problem I have had 3 transmission replacement. I was told that these trucks have a faulty transmission from the sales representative to the mechanics. After these transmission replacement now I have an engine problem where the lifters need to be replaced and camshaft. I have had all service done on time never missed a service. Now the dealership is telling me that this could be a reason why my transmission keeps going out. And can’t really give me a reason why I keep having the same problem. Truck has 97k miles on it when I purchased it had 45k I can’t even enjoy the vehicle because it’s always at the dealership with the same problem and they don’t know why it’s keeps happening, at this point it is a safety concern for me this is my daily driver where I drive my kids to school now I never know when it will just stop running. It jerks I’m afraid when I’m stop at a stop sign I might hit the car I front of me.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698609November 10, 2025
FUEL/PROPULSION SYSTEM, POWER TRAIN
I was driving on the freeway and my gmc Sierra at4 received a notification that I could could no longer accelerate. I pulled off to the side as safely as I could in a slanted hill in a major freeway with no shoulder. I sat on the side of the road for 45 min and then ran out of diesel gas waiting for the tow truck. We took into gmc and they said nothing was wrong, we were out of gas. But I ran out of gas waiting for the tow truck. The truck never shut off and ac still going, I just couldn’t accelerate. We’ve had the truck in the shop every single month for the past year for sensor issues and replacements and have all the documentation of the last few years of similar issues. No extensions of warranty’s nothing. Well we started to smell something burning this week and now we were told today we have a faulty fuel pump that will cost us $1,000 to fix and is not covered under our warranty. The truck is still under warranty, so why is something in relation to the power train not covered? There is a current t recall on other gmc models of this year for this fuel pump issue and the safety recall is EXACTLY what happened to us on the freeway and the issue we have now. Why has this not been extended to other GMCs????? My entire family could have died on the side of the freeway!!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698620November 10, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2017 GMC Sierra Denali. The contact stated that while driving approximately 40 MPH, the check engine warning light illuminated. The contact stated that the vehicle was shuddering and vibrating. The contact pulled over and opened the hood with the engine running. The contact stated that there was an abnormal ticking sound coming from the engine. The vehicle was driven to an independent mechanic, who diagnosed the vehicle and determined that the fuel injectors needed to be replaced. The vehicle was repaired; however, the vehicle was still running rough. The contact was advised by the mechanic that the fuel injectors needed to be reprogrammed, and the vehicle was taken to a dealer. The dealer reprogrammed the fuel injectors, but the vehicle was still running rough. The dealer had not opened the engine up to diagnose the failure; however, the dealer thought that there might be a failure with connecting rods. The vehicle was not repaired. The contact researched online and related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The manufacturer was not informed of the failure. The failure mileage was approximately 105,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698647November 10, 2025
ENGINE
Engine problems (Oil, crankshaft, loss of propulsion) similar to that of recalls in 2021-2024 models.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698403November 9, 2025
ENGINE
I got 3200 miles on my 2025 gmc 1500 6.2 engine. The engine crash. Knocking. Skund like its going to jump out. Been at dealer in columbus. Since Thursday. No one touch it
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698367November 8, 2025
STRUCTURE:BODY
Upper grill molding trim/bezel flew off truck. Part was recovered and clips look to have broken off. Plastic clips look to be insufficient and will break over time. Active recall for 2022 model vehicles only , needs to be expanded to 2023 or possibly further out.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698374November 8, 2025
ELECTRICAL SYSTEM
Telematics module failed directly after update, vehicle is outside of warranty (by mileage) but only 3 years old. no GPS, Onstar, and several other features that rely on this system to operate. several dealers would not even look at it when calling for appointment, one dealer stated that the part was on back order for up to 2 years and did not want to waste the time to look at it. Upon research, this appears to be a very common problem on all GM models with similar outcome
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698319November 8, 2025
ENGINE
I own a 2023 GMC Sierra 1500 (Black Widow Edition). The Truck has only 23000 miles on it. I experienced an Idle engine warning mid driving, and oil hot warning. It did Shutdown the engine of the vehicle and as I was trying to merge safely to the right lane and right side of the way the steering became very hard which put me and 3 of my employees in danger. After parking safely, I did call onstar and they ended up towing the truck while we waited for hours in the dark and cold temperature to get a ride. State police and Mdot did not show up even though we called them multiple times. This was a nightmare.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698051November 7, 2025
POWER TRAIN
Repeated transmission issues with the 8 speed transmission due to the malfunctioning valve body. This has caused major safety issues and nearly killed my family with the vehicle locked up and wouldn’t shift on the interstate. The dealership did a warranty repair on the torque converter which made the symptoms slightly better until the vehicle was no longer covered by warranty, at which time all symptoms came back. GM knows their 8 speed transmission has an issue and hasn’t provided a solution. Now, due to the faulty valve body, I have to have my entire transmission replaced for $8000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra