GMC Sierra Complaints

15,732 consumer complaints on file.

#11654541April 14, 2025
ENGINE
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, there was an abnormal sound coming from the engine compartment. The contact pulled over to the side of the road and discovered that the engine oil level was low. The check engine warning light was illuminated. The failure occurred on several different occasions. The vehicle was taken to a dealer, where it was diagnosed that the lifters needed to be replaced. The vehicle was repaired; however, the failure persisted. The vehicle was taken to a different dealer (Legacy Westbank Buick GMC; 3611 Lapalco Blvd, Harvey, LA 70058) to be diagnosed. The vehicle was not diagnosed or repaired. The contact was taken to a different dealer (Mossy of Picayune; 241 Frontage Rd, Picayune, MS 39466) where it was diagnosed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 27,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654310April 13, 2025
SERVICE BRAKES, ELECTRICAL SYSTEM
ESC ERROR PARKING BREAK NOT RELEASING Dashboard lights started flashing Check engine light came on
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654330April 13, 2025
ENGINE, FUEL/PROPULSION SYSTEM
Number 5 cylinder failure. Engined has failed cylinder is scored causing the engine to miss and lock up. The engine which is a 6.2 l87 is now under investigation for a piston failure causing the engine to lockup. The piston and engine issue has been investigated by my local repair shop and I can provide written and bore scope pictures of the failure. Yes the engine light was on the ESC was disabled and needed replaced and the traction control was disabled also the emergency brake was enabled and then failed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654332April 13, 2025
ENGINE
Complete engine failure while driving at highway speeds which put me and my family in dangerous risk of injury or death. The dealer confirmed the engine failure and needs engine replacement. The engine failed with no warning which only had 8700 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654259April 12, 2025
POWER TRAIN
Transmission locking up Was never notified about recall and my truck was never put on recall list they have gas lighted me and others with 23 models having same known issues Yes it is stuck at the dealer waiting on back ordered part but they arent aloud to inspect the gears in the transmission due to only replacing the control module Prior to this i had other failures between fuel control module to def fluid tank to shortened wire harness all of this issues make the vehicle go crazy between acceleration/ hard and no shifting which is a danger to drive and then there will be more wear and tear on other components that arent being addressed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654048April 11, 2025
POWER TRAIN, ELECTRICAL SYSTEM
Transmission keeps skipping missing gears and hard shifting, as well as jolting forward. When attempting to switch lanes vehicle transmission skips. When being placed from Park to drive or any other gear vehicle transmission hard shifts. Vehicle radio and screen shut off intermittently every 30 to 45 minutes. Vehicle screen goes blank and black and resets itself after 30 to 45 minutes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654106April 11, 2025
ENGINE
first we had coil issues then it turned out to be the lifters now we are being told we need a new 6.2l v8 engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654125April 11, 2025
TIRES:TREAD/BELT
LT275/65R20. We were traveling about 74 mph on Hwy 90 going westbound, when suddenly we heard an explosion and noticed pieces of the passenger rear tires coming apart. It was about 90 degrees when we were on the road, and I had checked the tire pressure earlier that day, and it was at the recommended tire pressure. At no point during our trip was there a low-pressure warning or we did not hit any object on the road. We would have had a severe accident if the tire had been on the front. The tread seems to have separated from the tire, causing major damage to the truck bed. The tire was manufactured in week 20 of 2022, and it still had a good amount of tread remaining. I do have front and rear dashcam footage available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654144April 11, 2025
ELECTRICAL SYSTEM, STRUCTURE:BODY
Tailgate comes unlatched and tailgate came down multiple times in motion and parked. Safety concerns loosing cargo and causing accidents. My vehicle is not included in the recall and dealer cannot help only repair for 146.80. I feel that my vehicle should be included to the already existing recall and reimbursement for repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654173April 11, 2025
ENGINE
at 16,000 miles Bank 1 lifters fail and replaced under warranty. now at 90190 miles Bank 1 lifters have failed again this time damaging the camshaft. I have all the service records for this engine and I was verbally assured by GM in 2021 that they would cover this repair until 100,000 miles. I know from looking on Google and talking with service advisors at GM that the 6.2L ecoTec3 V8 engines are having multiple problems related to my issue. GM should be able to warranty this engine to 100,000 miles and from past experience this engine should last 200,000 with good service.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654213April 11, 2025
ENGINE
Driving 75mph towing a 24' trailer and the motor just shut down and almost caused a massive pile up on [XXX] . 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
#11653806April 10, 2025
ENGINE
4-5-25 Going 65 mph truck shut off for no reason. Dash message stated “press button to restart” I managed to pull over on side of road and place in park and restarted. Drove home and Chevy dealer service was closed. 4-7-25 Called in morning to get truck into service. 4-8-25 Service advisor called and stated No dash lights no codes . I explained that it was scary to have truck shutoff with no reason.i also stated that truck lurches and auto stop sounds wierd. Dealership Said tech was going to investigate further. I got a call next day 4-9-25 Service advisor said the main bearings bad and tech recreated problem and that motor was blown and need to order new from Michigan . Service advisor said he ordered engine and that it was known issue and covered under warranty. I asked how long he would have truck and he stated NO ETA. Truck engine seized during tech driving to reproduce my issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11653824April 10, 2025
POWER TRAIN
Transmission has been failing for the life of this vehicle. Shuttered shifting and hard shifting are the norm. It is available for inspection. Vehicle does not shift properly when vehicle is in motion. Shifting is often delayed resulting in temporary loss of power. I have had the vehicle in to a transmission shop they have been able to reproduce the events. There are no warning lights visible to indicate an issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11653851April 10, 2025
ENGINE
While driving on a busy highway, the vehicle lost all acceleration. Seconds later, the entire truck shutdown. Lucky, I was able to get into the right hand lane prior to losing complete power, which allowed me to steer the truck onto the shoulder. It appears that an investigation has been launched into vehicles equipped with the GM 6.2L V8 L87 engine. This catastrophic engine failure not only put me in a fairly unsafe situation, it is costing me $13,800 to replace the engine on a 2022 GMC Sierra Denali.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11653960April 10, 2025
POWER TRAIN
The contact owns a 2023 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the “Service Transmission Now” warning light illuminated. Additionally, the contact stated that the warning light and a message indicated that the transmission would stop shifting soon. The vehicle was taken to the dealer; however, the vehicle was not inspected. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 31,230.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11653993April 10, 2025
POWER TRAIN
Original issue started at about 60K miles regarding hard shifts and clunking with acceleration with my 2017 Sierra 6 speed transmission. I had it inspected by the dealer when I purchased it, told it was normal for this model. Had it inspected by independent shops, told that this is a known issue, but not fixable without a new transmission. At 90K miles, began experiencing a whining sound while idling. Told it is in the torque converter/transmission housing but I could not afford the thousands of dollars for replacement/inspection. I had the transmission fluid serviced and changed as recommended with the dextran ATF that GM recommends in the manual both at 60K miles, and again at 100K miles as recommended. I also drive the vehicle reasonably, yet still at 130K miles had the transmission and converter fail. With no warning, no check engine lights or vehicle codes. Even after I lost 5th and 6th gear, there were no warnings or alert in my truck and despite the transmission giving out while on the highway. I feel this is a huge safety concern with both GM torque converter and transmission issues being known, as well as my vehicle not giving any warnings before, during, or after my transmission failing. I have had the warning lights checked as well, I’m told they are fully functioning when tested, so for some reason there seems to be an inherent issue with the truck’s warning system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11653799April 9, 2025
ENGINE
2024 the lifters when out in the engine and were replaced 2025 the engine malfunctioned while driving on the highway. There were messages that came up of low oil pressure and the engine completely locked up The dealership is saying the engine needs to be replaced
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11653595April 9, 2025
ELECTRICAL SYSTEM
Rear defroster failure. The rear defroster was turned on causing smoke to appear from the power sliding rear window, then the rear window shattered causing glass to fly into the backseat and truck bed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11653665April 9, 2025
ELECTRICAL SYSTEM
This truck, along with many others, has had wiring harness issues. My truck has fought this issue within the first six months of owning the truck. Since Jan 2025 it has left me stranded 3 times to be towed, and in the shop a total of 6 times for wiring harness issues. Rubbing that GM is 100% aware of how its designed. This has caused the truck to hesitate, shake, lunge, go in and out of gear severely hard then shut off while driving. All three time this happened to me recently i was on the interstate. GM has work orders out with all the codes and symptoms but wont do anything about it. Yes, i am out of warranty, but i am now paying over $5,000 for a new harness to be installed by a different dealer. The dealer that had always worked on this truck requested $8,100 so i called a new GM shop. This is a large issue and they keep turning their back and not addressing the issue and putting drivers at risk! Can provide last diagnostics and can request all notes from Stoops Buick GMC in Muncie Indiana, i have a rather large file there on this truck.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11653668April 9, 2025
POWER TRAIN
The contact owns a 2019 GMC Sierra 1500. The contact stated while driving 75 MPH, the vehicle occasionally downshifted or unintendedly came to a stop. There were no warning lights illuminated. The vehicle was taken to a dealer and the vehicle was diagnosed and the contact was informed that the transmission software needed to be updated. The vehicle was repaired; however, the failure persisted. The contact stated that on another occasion, the vehicle started to turn off unintendedly at traffic lights. The vehicle was taken to a different dealer and the vehicle was diagnosed and it was determined that the valve body software needed to be updated. The vehicle was repaired; however, the failure persisted. The contact stated that on another occasion, the vehicle started to vibrate violently while driving on the highway. The vehicle was taken to the original dealer and the dealer replaced the transmission; however, the failure persisted. The vehicle was taken to a different dealer and the vehicle was diagnosed with torque converter failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 48,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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