GMC Sierra Complaints

15,732 consumer complaints on file.

#11655335April 17, 2025
ENGINE
Vehicle went into limp mode. 36 check engine codes popped up all related to cam shaft and lifter issues. Vehicle was taken to a shop and it has been determined that the passenger side lifters and rollers have sized due to the active fuel management system. This is the L86 GM 6.2 liter motor, that has developed the same issues that the L87 motor is being investigated for. There where no tail tail signs or check engine lights that were on prior the the lifter failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654886April 16, 2025
POWER TRAIN
I bought this vehicle at 80k miles and I have had an on going issue with the transmission. I have done research online and found that GM had put the wrong fluid in the transmission from the factory that has caused internal issues with the transmission leading to hard shifting and transmission shuttering. On my dime I have changed the fluid twice already and also the torque converter as well. This issue has gotten better but still a problem. This has caused me to not be able to trade my truck with out being upside down because of the dealers telling me they would have to put a new transmission to sell it. So now my trucks value has dropped as well. Now I am stuck in a truck that is not safe to drive. Thanks GM for not helping me.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654907April 16, 2025
ENGINE
The engine went out while driving on the highway. Was driving around 60 mph. I almost gone to an accident. GM seemed like they knew of the problem but did not warn none of their customers of this problem. Car only had around 35,000 miles. GM however did swap out the engine. I want to sell and or trade it in, however the year and model lost its value due to the fact of the faulty engines.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654944April 16, 2025
ENGINE
The contact owns a 2015 GMC Sierra 1500. The contact stated that while the vehicle was parked and occupied at the residence, the contact exited the vehicle and went inside his home; however, forty minutes later, while attempting to start the vehicle, the vehicle failed to respond as needed. The contact stated that a bystander inspected the vehicle and assumed the starter had failed. No warning light was illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and suggested that the contact take the vehicle to the local dealer for assistance. The approximate failure mileage was 141,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655027April 16, 2025
STEERING, ENGINE, ELECTRONIC STABILITY CONTROL (ESC)
The contact owns a 2022 GMC Sierra 1500. The contact stated that while depressing the brake pedal, the transmission would downshift, and the vehicle was aggressively shaking while idling and while depressing the brake pedal. While driving approximately 35 - 40 MPH, the Electronic Stability Control (ESC) Service message was displayed, and the check engine warning light was illuminated. The contact was able to pull over to the side of the road, the vehicle was turned off for a while and then restarted to continue driving. The vehicle was taken to the dealer, who diagnosed that the crankshaft, bearings, and tie rods needed to be replaced due to engine failure. The engine was rebuilt and the vehicle was repaired. The manufacturer was not informed of the failure. The failure mileage was 86,636.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655037April 16, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2019 GMC Sierra 1500. The contact stated that the vehicle was taken to the local dealer for a routine oil change. The dealer informed the contact that the oil level was low. The contact stated while driving at 25-30 MPH, the low oil pressure message was displayed. The contact pulled over and there was oil on the ground. There were no warning lights illuminated. The contact stated that the failure was related to NHTSA Action Number: PE25001 (Engine and Engine Cooling). The vehicle was towed to the local dealer again, where it was diagnosed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 127,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655076April 16, 2025
ELECTRICAL SYSTEM
Tailgate opened while in park.closed garage door.Came back out to leave and garage door got caught on tailgate that had released open on its own causing body damage.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655124April 16, 2025
ELECTRICAL SYSTEM, ENGINE
Transmission recall was performed at a gmc dealership. Vehicle has been the the shop repeatedly since. Coolant control valve crank case position sensor new catalytic converter and dpf system. New low temp coolant loop pump. In the shop now for another low temp coolant pump that’s been shorted out. Seems to have on going electrical issues since recall was performed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655130April 16, 2025
ENGINE
Was going up a hill and all of the sudden the engine stopped, the truck coasted to the edge of the road. A message came on saying 'Press start to reset engine.' Doing so did nothing. The truck ended up having to be towed to a dealer. They were not able to turn the engine over by hand and ended up diagnosing the engine as a seized from a failed bearing. They ended up replacing the entire engine with a new identical one. They have not been able to tell me if the new engine is in the same engine group that I could experience the same thing a second time.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654861April 15, 2025
ENGINE
I heard a knocking noise in my engine on 4/13/25 and took it to a dealer to diagnose on 4/15/25. I had previously had to have the engine rebuilt due a collapsed lifter at 70,000 miles and I was concerned that the noise was a precursor to a repeat of that problem. Instead, the dealer informed me that problem was a failed connector rod bearing and would require a replacement engine. The service manager said my truck was not safe to drive since it could experience a sudden catastrophic failure on the highway. The truck has 80,000 miles and has been serviced at every single required interval by the original selling dealer. There was no check engine light warning.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654863April 15, 2025
ENGINE, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
repeated mechanical failures of my 2022 GMC Sierra AT4, which I purchased on October 26, 2024, with approximately 37,000 miles on the odometer. The adaptive cruse control is wonderful when it works but I have found even with the sensor clean the truck will slam on brakes on its own causing me to nearly be rear ended. It happens when driving into the sun and at night. I no longer trust adaptive cruse and use manual cruse. Within just 55 days of ownership, and after driving roughly 4,700 miles, the vehicle experienced a catastrophic engine failure without warning on December 20, 2024. This failure left the truck immobilized in a highly dangerous situation—stuck in the middle of a 65-mph highway at a red light, without the ability to shift into neutral and remove the vehicle from traffic. I was forced to activate the emergency flashers and exit the vehicle, standing helplessly on the side of the road while praying that oncoming drivers would see the truck in time to avoid a potentially deadly accident. The truck was towed to the dealership the following day, December 21, 2024, where it remained for an unacceptable 110 days awaiting a replacement engine. I finally took possession of the repaired vehicle on April 10, 2025. Shockingly, only two days later—after driving just 328 miles—the vehicle suffered a second catastrophic engine failure without warning. The truck is now inoperable once again, sitting in my driveway and in need of a third engine replacement. While the odometer currently reads 42,365 miles. This ongoing situation has been not only a major inconvenience, but also a significant safety concern and financial burden. I am extremely disappointed in the reliability and performance of this vehicle. This level of failure on a vehicle that is still under powertrain warranty is simply unacceptable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654874April 15, 2025
POWER TRAIN
Valve body failed while pulling my camper down the interstate. Transmission began to have issues and locked up on us while driving. Luckily i was able to avoid any accidents. Had truck towed to a private Transmission shop to have the transmission repaired. Shop advised the failure was due to the faulty valve body.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654649April 15, 2025
ENGINE
At 61k miles motor siezed. Took 3 months to get a replacement this was 10/24 got truck back Jan 25, drove 3k miles and motor is knocking. Been at dealer since 2/2/2025. Waiting for replacement motor.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654653April 15, 2025
ENGINE
While towing my boat to the Florida Keys, I encountered a series of mechanical issues on Interstate 75. The engine’s exhaust became excessively loud, causing the engine to abruptly shut off. Despite successfully maneuvering into the safety lane, I was unable to restart the engine. I promptly contacted the dealership, which dispatched a tow truck to my location. However, the tow truck driver was unable to put the vehicle in neutral gear. Subsequently, I reached out to GMC, which informed me that the tow truck required a flatbed for transportation. I waited another two hours for a flatbed truck to tow the vehicle to the dealership. A few days later, I received notification that my engine had seized, necessitating an engine replacement. The dealership informed me that the 6.2-liter engine was experiencing a national backorder. I had purchased this used vehicle less than a month prior and had not yet made my initial payment. Consequently, I find myself without a vehicle. The dealership has been unable to provide an accurate timeline for the repair to be completed.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11654688April 15, 2025
POWER TRAIN
Failure in the lithium-Ion battery system. Battery conditioning system failed to manage heating and cooling of the battery system leading to catastrophic system failure. Dealership and manufacturer are unable to make repair leaving the vehicle un-operable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654705April 15, 2025
ENGINE, ELECTRICAL SYSTEM
While driving my 2022 GMC Sierra Denali 6.2L truck, it somehow turned off. I placed it on neutral and tried to turn on, but it didn’t. I maneuvered to stop at the side of the road, but I was not close enough to the curb making it uncomfortable for others to drive around. I tried again to turn on the truck, but it didn’t. Before and after everything looked good, there were no symptoms or warning lights on the truck. I gave it a break and tried to turn in the truck, but it didn’t. I called GM roadside asst., and I got towed to the closed GM Services. They found out that battery was damaged, and an open starter fuse damaged. They changed the battery, the fuse block, and did the multi-point vehicle inspection (MPVI), and everything seemed good. I picked up my truck, and on my way back home the engine stopped running. At this time I get into a left turn lane, and I was able to stop before the stop line. This time I was in the middle of the road. I turned on the Hazard Warning Lights, but too many cars turning left pass through making it dangerous to my safety and others. I called the service department where my truck was serviced and GM roadside asst., and it got towed to the same service place. All this process was again around 2 hours in the middle of the road. They checked the truck, and found out that the battery was damaged, and an open starter fuse again. They changed, but this time they kept it on test to the next day and the starter fuse was damaged again. They found that the engine was locked, which is why the starter heats up and the amperage consumption increases, opening the fuse, the engine does not turn easily, the oil is at the correct level, it does not indicate low pressure in the initial driving test. They removed the oil pan and found metal particles in the oil and in the pan. After that they removed the rod bearings and can see that they are scratched and overheated, crankshaft scratched as well. Need order a new engine, oil cooler, oil cooler lines.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654782April 15, 2025
ENGINE
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving 70 MPH, several unknown warning lights illuminated, with the message to shift to neutral displayed. The contact pulled over to the right side of the road and attempted to restart the vehicle; however, the vehicle failed to respond as needed. An unknown dealer was contacted. The contact stated that the failure had occurred on several occasions. The vehicle was towed to the dealer, where it was diagnosed that the engine was damaged and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and offered a monetary payment. The approximate failure mileage was 80,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654431April 14, 2025
POWER TRAIN
# 11648853 issue started on [XXX] I just experienced the same issue yesterday, and left it at dealership. Transmission fails to shift, upon entering highway, and concerned about being struck from behind. GMC dealer claimed to have addressed the issue at 4785 miles, and now 4 weeks later, at 5196 the same issue started again. I felt a slight shudder, and then loss of power, and "Reduced Acceleration Drive with Care" came on instrument panel, along with check engine light on. 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
#11654497April 14, 2025
STEERING
I bought this new vehicle from Diamond Chevrolet in Auburn, MA, in November 2024. The truck currently has approximately 10,000 miles on it. On two separate and distinct instances, the truck suffered a complete loss of power steering while driving on the highway. In both instances, the issue persisted until I turned the vehicle off. Numerous warning indicators were illuminated on the dashboard (Service Power Steering, Drive with Care, Service ESC, etc). A loss of power steering is a significant safety defect, and it was hard to steer the truck at lower speeds. The dealership and General Motors were able to replicate the issue and replace the entire power steering rack during the first instance of power steering loss. Currently, the vehicle is still being diagnosed by the dealership and General Motors for the current yet similar issue. The issue is intermittent but poses a significant public safety risk to the consumer and general motoring public.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654538April 14, 2025
POWER TRAIN
The contact owns a 2020 GMC Sierra 1500. The contact stated while driving 65 MPH, the vehicle briefly started to shimmy. Upon decelerating, the vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 24V797000 (Power Train), but the VIN was not included. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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