GMC Sierra Complaints

15,732 consumer complaints on file.

#11701315November 24, 2025
POWER TRAIN
During takeoff the transmission acted as if it was in neutral while I was crossing traffic luckily, the semi truck that was coming towards me was able to stop. I had the vehicle towed to a shop. After the vehicle was towed to the shop the transmission acted normal when the mechanic searched the VIN number. There was a service bulletin issued by General Motors for this exact problem. Had the semi not been able to stop. It could’ve very well killed me or my children. I suppose if it would’ve killed someone, maybe general motors would finally do a recall for this very disappointed in general motors and the NHTSA, the fact that this is an ongoing problem and has not been fixed and as a customer, I was not even notified that this problem existed is very alarming.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701346November 24, 2025
LANE DEPARTURE: WARNING, LANE DEPARTURE: ASSIST, UNKNOWN OR OTHER
While driving in bumper-to-bumper traffic, my vehicle suddenly lost all engine power, the accelerator became unresponsive and the dash indicated "press start". There were no warning lights, no messages, and no prior symptoms before the failure occurred. I was in an active traffic lane when this happened, which immediately placed me and others at risk of being rear-ended. After several seconds, and pressing the start button, the vehicle regained power. But the odometer was indicating I was going 30+ mph when I was going less than 10 mph, so I pulled over to the side of the road. The vehicle is also was having issues with the lane keeping assistance was unavailable. This is is a new vehicle purchase directly from the dealer in August 2025, with approximately 4,500 miles at the time of the incident that occurred on, 11/18. The problem has not been reproduced by the dealership, and no diagnostic trouble codes were found. The vehicle has been at the dealer for inspection since 11/20, but I was informed that the issue would need to happen again before they could diagnose it. This type of sudden power loss while driving is a serious safety concern, especially because it occurred without warning and could happen again unpredictably. At this time, the cause it UNKNOWN, but the component or system responsible for the power loss should be inspected. The failure appears to be intermittent and without warning.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701356November 24, 2025
VISIBILITY/WIPER, EXTERIOR LIGHTING
While driving in the rain, the windshield wipers were on the highest intermittent setting and the high beam headlights were also on, automatic highbeams were not. The high beam lights dimmed to low, and the windshield wipers stopped in the middle of the windshield in the middle of navigating a sharp right hand turn at 35mph. The wipers stopped for approximately 30 seconds and then resumed operation. When the wipers resumed operation, the headlights also turned back on high with no input from the driver.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701366November 24, 2025
ENGINE
Engine fan has been constantly running, with engine temp reading around 230 consistently. After driving 5 miles on the interstate it shot up to 260 and said “engine temp overheating, idle engine”.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701098November 23, 2025
ENGINE, ELECTRICAL SYSTEM
Complete engine failure. I was driving approximately 55 miles an hour, then all of a sudden the cruise control automatically shut off and a series of alarms are triggered. When pressing the accelerator pedal, the engine vibrated excessively in Cleary indicated catastrophic engine failure. I was lucky enough to make it to the nearby dealer who confirmed a complete engine failure. I ended up buying a new vehicle that day to avoid being stranded.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700944November 22, 2025
ENGINE
I am Having direct issues with the engine when the vehicle is started and continues while idling or driving at any rate of speed.There's a continuous "Knocking" noise that has concerned me for a while now. My vehicle (2020 GMC Sierra 6.2 liter gas engine) with almost 100,000 miles has been doing this for a while now (at approximately 50,000 miles) and (was documented at the dealership when I made a complaint which included what I considered the vehicle to be using/losing more "oil consumption" than the normal 3-4 quarts between oil change) dating back to 2022 0r 2023 when I was told by the dealership that the amount of oil being used/ lost still fit within the manufacturers specifications.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701023November 22, 2025
ENGINE
Around June 2025 under normal driving my truck displayed engine oil low which I promptly checked the oil to find that it was in range. The light later went off but I still brought it to the dealership to which they could find no issues. From there over the next month or so the truck developed a low end popping sound on start up and at my next oil change at the dealership in August of 25 I asked them to listen to see if they heard it and could recommend a course of action. They reported not hearing anything. On October 19th I had my family in the truck with me and during normal acceleration the engine had a loud pop sound and lost power. Every warning light came on and I pulled over promptly when safe. I had it towed to the dealership and their initial diagnosis was a failure on cylinder 4 with a suspected failure of either the cam shaft or lifter. Given the poor design of the lifter I didn’t want to go back with the OEM lifter so I had it towed to an aftermarket shop. It is there now and they are in the process of tearing down the engine. After watching a video on YouTube I fear my truck is part of the connecting rod bearing failure under PE25-001. My understanding is there is an official investigation into the trucks outside the initial recall. I wanted to submit this for your review as the truck only had 74,000 miles. Freeman GMC in Grapevine, Tx has performed all the maintenance and should have documentation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700926November 21, 2025
ENGINE, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
my engine went out with no lights or warnigns prior to engine going out. Now we still making payments for the truck,expensive truck and we haven't use it because we dont have the money to fix it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700611November 20, 2025
POWER TRAIN
My truck had engine failure while at the dealership getting new tires installed on 11/12/2025. When they started my truck they detected major knocking in my engine the 1st thing in the morning. It unsafe to drive they're telling me my engine needs to be replaced. My engine has 58,000 miles on it. There was no issues with my truck when I drop it off.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700623November 20, 2025
AIR BAGS
The contact owned a 2019 GMC Sierra 3500. The contact stated that while driving during a rain storm at approximately 60 MPH, the vehicle hydroplaned. The contact stated that the vehicle swerved to the right and then to the left. The contact stated that the vehicle drove off the road and down an embankment. The contact stated that he drove over a mound, and the vehicle was launched into the air, and, according to the police report, he traveled approximately 100 feet. The contact stated that the vehicle landed on the front end. The force of the crash had bent the vehicle frame behind the engine. The contact stated that as the vehicle's front end crashed into the ground, his forward momentum sent him into the center console. The contact stated that the center console struck his face and caused lacerations and a bloody nose. The contact stated that the police and emergency services had arrived on scene. The contact stated that a report was written, but he did not have the report number. The contact stated that he had bent the top half of the steering wheel from the force of the crash. The contact was transported to the emergency room. The contact was advised that he had fractured vertebrae between L1 and L3 and had bruised ribs on his right side. The contact stated that the vehicle was towed to an impound lot and later declared a total loss by his insurance provider. The contact stated that none of the front air bags had deployed. The contact stated that the police and the insurance provider confirmed that no air bags had deployed. The manufacturer was informed of the failure. The failure mileage was approximately 103,000.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11700630November 20, 2025
ENGINE
The injector failure in my 2018 GMC Sierra 1500 resulted in repeated misfire conditions (P0300 and P0307), causing the vehicle to lose power unexpectedly while driving. The engine would hesitate, shake, and struggle to accelerate, especially during merging or highway speeds. These symptoms created a significant safety hazard because the vehicle could not reliably maintain speed or respond to throttle input. Sudden power loss in traffic exposes the driver and surrounding motorists to an increased risk of collision, particularly during lane changes, freeway merging, intersection crossings, and passing maneuvers. The dealership confirmed internal injector failure, and the vehicle has been out of service for three months without resolution. This is a safety-critical defect that compromises vehicle controllability, stability, and safe operation on public roads.”
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700648November 20, 2025
ENGINE, FUEL/PROPULSION SYSTEM, EXTERIOR LIGHTING
On August 3, 2025 I was on the road enroute to my residence. With no warning my 2024 GMC Sierra 1500 SLT engine quit. We heard a popping sound and the entire vehicle shuddered. I took safe control of the vehicle. As I intervened I noticed that the dash warning lights were lit. Almost immediately the warning lights went off and the engine restarted on its own. We were startled and extremely concerned about what had just happened. This was the first problem we encountered with the truck. I contacted the DeLuz Chevy garage in Hilo for a follow-up appointment.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700664November 20, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2024 GMC Sierra 1500. The contact stated that while driving 30-35 MPH, the oil pressure warning light illuminated. The contact pulled over into a gas station. Upon further investigation, the contact noticed that the oil level was low. The contact added two quarts of oil to the engine. The contact stated that on a separate occasion, while the vehicle was at the dealer for an oil change and the contact informed the dealer of the low oil pressure. The dealer inspected the engine but found no cause for the failure. The contact stated that afterwards, the oil pressure warning light was intermittently illuminated. The contact stated that the engine was consuming an excessive amount of engine oil. The contact had to check the oil levels every two weeks. The manufacturer was not made aware of the failure. The failure mileage was approximately 11,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700667November 20, 2025
ENGINE, FUEL/PROPULSION SYSTEM
I was operating my GMC Sierra 1500 SLT in Hilo HI. As I was slowly turning left from [XXX] onto [XXX] my vision was drawn to the rear view mirror. My wife and I observed a huge smoke like cloud above the tailgate of my truck and beyond. I immediately reduced my already slow speed. Traffic was heavy and I was unable to safely assess the problem on the spot. When I arrived at my destination a few blocks away I found no physical evidence that it had occurred. It has not happened since. Even so, we were concerned enough to make an appointment with DeLuz Chevy in Hilo for assessment. Unfortunately in the interim I experienced another problem with the truck and asked that it also be addressed during the smoke related appointment. Again unfortunately the DeLuz service department did not assess the smoke incident during the service visit. 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
#11700676November 20, 2025
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
After pulling my 2024 GMC Sierra 1500 SLT into a parking space at a local store, I shut off the engine. I observed the lighted ignition switch and the dash icons were illuminated even though the engine was completely off. Having had my foot on the brake at the time I decided to test the ignition switch to determine why it was lit while the engine was off. When I pressed the start button there was a loud, whining starter like sound, grinding like metal on metal. The noise was so alarming that I immediately took my hand off the ignition. The engine was still off. After waiting a significant amount of time I tried to restart the engine. Exactly the same thing occurred. On the final attempt to start the engine, 15-20 minutes later, it started and ran quietly like nothing had ever happened. On returning to the vehicle my wife asked what all the loud grinding noise was about. She had heard it while she was inside the store. I advised her it was our truck! The incident was shocking to us both and because of its bizarre nature I was afraid to drive the vehicle back home. As I already had an appointment on November 6 at DeLuz Chevy for another incident, I called them on November 3 to add this incident to the existing appointment. This incident was added to the November 6 appointment. Unfortunately the service department did not assess the previous incident and only addressed this incident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700684November 20, 2025
ENGINE, POWER TRAIN
Less then 47 000 miles on truck, Used for only city driving, no off road driving or rigorous travel. - engine malfunction and could have had catastrophic failure while traveling causing injury to myself or others. -Car is inoperable, dealer recommend not to drive it due to safety concerns. -I have metal shavings in the oil, misfires, and a P0011 code. These match the known GM lifter/camshaft failure pattern. Vehicle started skipping check engine light turned on for cam shaft interrupter magnet. GM has open recall for 2021-2025 engine However 2019 vehicle is still under investigation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700705November 20, 2025
ENGINE
I just surpassed my extended warranty (5 year/100,000 miles) by a couple of thousand miles and my coolant control valve has gone out. The problem is so common that the part is on back order for months at a time. GM says that they issued special coverage for 2020-2022 models, but my dealer is telling me that my VIN is not covered. They want to charge me $2,400 to replace it. This is insane. It’s a very common problem that they know about and it’s going to almost break me. We need help!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700403November 19, 2025
UNKNOWN OR OTHER
Safety Recall N242454440 Momentary Rear Wheel Lock-Up was issued for 2020 to 2022 GMC Sierra 1500 but mine is not included. I drive a 2020 GMC Sierra 1500. It is experiencing harsh shifting and now there is a feeling in the rear wheels like they are trying to get stuck or hang up. Why is my truck not included?
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700467November 19, 2025
ENGINE
The engine in my vehicle has failed twice while driving at highway speed. Both times, the engine suddenly stalled without warning, causing an immediate loss of propulsion, lighting, and steering assist. Each failure occurred at night, and I had to coast to the shoulder in the dark with limited control while other vehicles traveled at high speed. During the second incident, two children were in the vehicle. Both events created a serious risk of a collision or injury. The failure involves the primary propulsion system. After the first incident, the dealer replaced the engine and performed recall-related updates. Months later, the replacement engine failed in the same way. The dealer inspected the vehicle after each incident, confirmed the failures, and is replacing the engine again. The issue has therefore been reproduced and verified by the service center. There were no warning lights, messages, noises, or drivability symptoms before either failure. The engine stalled suddenly both times. A separate exterior trim piece, previously repaired under a recall, also detached while driving, adding an additional hazard. Both engine failures and the sudden loss of lighting and power created a clear and immediate safety risk to occupants and surrounding traffic. The repeated nature of the defect after a full engine replacement raises concern that the underlying issue has not been resolved.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700257November 19, 2025
ENGINE
My 2020 GMC Sierra 1500 Denali with the 6.2L L87 V8 just began experiencing a new rough idle with intermittent RPM dips. There are no engine codes or warning lights. Idle drops are noticeable, suddenly began this week. I am concerned due to ongoing NHTSA Engineering Analysis EA25-007 involving this engine. Some owners reported engine failure with little warning. The truck has right over 68,000 miles on it and has had every oil changed performed at a GM dealer. I have had to top off the oil between cycles and always used the recommended oil, being the Dexos Gen 3 due to the truck burning a small amount of oil. More detail on a possible cause. I believe it would be worth investigating the DFM technology. I will be performing a fuel cleaner and possibly a lifter cleaner and/or additive. I would like to tune the truck and turn off the DFM since this is what I have read causes the truck to burn oil and damage the lifters. However, I will wait until this Analysis is completed before deciding to change the truck's stock tunes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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