GMC Sierra Complaints

15,732 consumer complaints on file.

#11730614April 12, 2026
SERVICE BRAKES, POWER TRAIN
When I begin to accelerate on the highway, and the truck downshifts, it locks up the rear brakes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730328April 10, 2026
ENGINE
Engine Failure. I was driving down the highway pulling a trailer and the RPMs raced up and I instantly lost power. Had to try and get over to the right lane/shoulder after losing all power. Extremely scary situation going 75mph on a 3 lane highway in the left lane. Luckily I made it to a safe spot but once there, I could start the truck. It. Would sit a power cycle. Tow truck couldn’t get it into neutral so had to drag it up the flat bed. After being towed to dealer they confirmed the engine was shot and ordered a new one on March 9th. We are now over 30 days without my truck. This has not been inspected by anyone besides the dealership it was towed to and the dealership I bought the truck from and use for service. My truck was in the shop many times prior to this. Had to have the cam shaft replaced before the recall fix was published to dealerships. Once fixed my wife picked it up with my child and once they left the dealership it started vigorously shaking again and she brought it back to be told it was a fault plug and plug wire. Once our VIN came up for recall it passed the test and they put new oil in and sent me on my way. A couple weeks later it was acting strange again and I brought it back for them to again say it was a faulty plug/wire. About two weeks after this is when the engine locked up. Truck has 38,000 miles and doesn’t feel safe for our family. What can we do?!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730376April 10, 2026
BACK OVER PREVENTION
The contact owns a 2023 GMC Sierra 1500. The contact stated while reversing, the rear-view camera displayed a black image, and a message advising that the rearview camera was unavailable, was displayed. The contact stated that upon depressing the brake pedal, the rear-view camera screen reset independently. The vehicle was taken to the dealer; however, the failure was not diagnosed. The contact stated that the dealer inspected the wiring harness and the rearview camera display but found no failure. The manufacturer was made aware of the failure, and a case was filed. The contact stated that an engineer was assigned to inspect the vehicle. The engineer performed an inspection; however, the cause of the failure was not determined. The vehicle was not diagnosed or repaired. The failure mileage was approximately 37,188.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730394April 10, 2026
ENGINE
16 year old was driving down the interstate, Truck stopped accelerating out of no where and lost speed while in the middle lane. Steering wheel locked up, Car showed Oil pressure issue. Was told to shift to Neutral and restart. Barely made it to the shoulder. App showed only a battery issue and no other alerts. Thankful we did not get hit as cars were flying by on either side on the interstate. Could have been a serious accident. The dealership confirmed that the engine needed to be replaced. Truck had full 50,000 Mile service recently. Also, had passed the GM recall and were told the engine wasn't effected 9/20/25. No warning lights or issues prior. Completely out of the blue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730404April 10, 2026
BACK OVER PREVENTION, ENGINE, ELECTRICAL SYSTEM
The contact owns a 2024 GMC Sierra 2500. The contact stated while reversing, the rear-view camera displayed a blank screen. The 4WD system engaged unintendedly, and the park assist sensor was inoperable while an unknown message was displayed. Additionally, the vehicle lost motive power while driving. The check engine warning light was illuminated. The vehicle was towed to the dealer, who replaced an unknown module and reset the computer, but the failure persisted. The contact stated that the vehicle was taken to the dealer five times, but the failure recurred after several unknown repairs. The vehicle was not repaired. The contact had requested for a buyback from the dealer, but no assistance was provided. The manufacturer was made aware of the failure. The failure mileage was approximately 8,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730408April 10, 2026
ENGINE
I had left work and pulled out of the parking lot to head towards the freeway. I had driven about 3 blocks and the truck made an indicator alert noise. My dash panel said reduced power mode or something to that effect. The truck felt as if it lost power. Luckily I was able to pull to the side of the road at which point I put it into park and shut it off. I waited a moment and then tried to restart it. The dash panel said something but it was too fast for me to read before it went away. The engine was cranking but it did not restart. I tried several more times before calling roadside assistance to have it towed to a nearby dealership. The dealership said that I would need to replace the engine $18,751.92. They said the Camshaft RPM are 0 while the crankshaft RPM is 2-300. Lifters and Rockers are not moving. The chain is most likely broke as well. The fuel pressure is about 30 psi in the high side. It would be just as expensive if not more to try and repair the existing engine if it is even repairable which they wouldn't know until they took it apart at which point I would have to pay for that as well even if it was not salvageable. They would need to replace the oil lines and cooler as well because debris from the engine could be in them and would do more damage if not replaced. I had already replaced the oil lines and cooler within the last 6 months. The truck has 114,000 miles. My warranty still had 3 months on it but the mileage stopped at 100,000 so I am out of luck. When I researched online to see what it could be I saw there are known problems with this 6.2 L87 engine and that many fail around 100,000 miles. There are other recalls but the 2019 was not included in the recall. If I choose to have the work done it will take several weeks in which I will now have to rent a car as well. Not much of a choice when I still owe $30,000 and they only offered me $9,000 for it as is with the bad engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730419April 10, 2026
ENGINE, POWER TRAIN
ENGINE LOCK UP WITH 5018 MILES ON, IT IS A THE 6.2 MOTOR ROD AND CRANK BAD
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730423April 10, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at approximately 70 MPH on the interstate, the vehicle experienced a sudden loss of engine power and decelerated rapidly, nearly causing an accident. The contact managed to pull off the road, but the failure persisted. Additionally, the contact reported a prior history of excessive oil consumption. During a previous visit to the dealer, the contact was advised to shorten the vehicle oil change intervals from 10,000 miles to 5,000 miles to mitigate the oil loss. The contact stated that the dealer failed to determine that the excessive oil consumption was an early symptom of the current engine failure. The vehicle was towed to a dealer, where it was diagnosed and determined that the belt filter and the piston needed to be replaced within the camshaft assembly. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 80,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730473April 10, 2026
ENGINE
Driving on the PA turnpike at speed with traffic and the engine lost power and started squealing. No lights came on, I was able to get to the side of the road and the truck shut off. When I restarted it, it sounded terrible. Had it towed to dealer and dealer stated that the engine had a terminal failure with the crank bearings and needs replaced. I was fortunate at the time of the issue that I was able to get off the road since the truck lost all power.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730500April 10, 2026
POWER TRAIN
The ABS light came on while driving. Tire and components were removed to expose the axle housing. It was determined by the parts manager at DeBauche Truck and Diesel that the rear wheel hub nut had come loose and destroyed the threading. The damage was catastrophic, in that continued use of the vehicle may result in an accident and the vehicle cannot be driven until remedied. GM customer satisfaction program released a notice dated January 2018 for this specific safety issue. Reference number N172120230. A replacement axle cost was 2078.35 with additional parts and labor to be determined. Vehicle was purchased 8/29/2025 from Morrie's West Salem with no indicated reports of the issue through carfax and no related recalls through nhtsa. The vehicle had 30,967 miles at time of purchase.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730503April 10, 2026
FUEL/PROPULSION SYSTEM
I was driving to work when my vehicle’s check engine light illuminated, accompanied by a warning message stating, “Low oil pressure—turn vehicle off.” I immediately followed this instruction and shut the vehicle off. When I attempted to restart it, the engine cranked repeatedly before finally starting, but the same warning message reappeared, prompting me to turn it off again. A few months prior, I had the vehicle inspected at the dealership, where I was informed that it passed the 6.2L engine national recall inspection. On April 9, 2026, the vehicle was towed to the dealership for further evaluation. On April 10, I was contacted and informed that technicians could hear a metallic noise coming from the engine. However, they stated that the readings from the PICO test were not high enough to meet the criteria for engine replacement. The dealership recommended replacing the camshaft position sensor but could not confirm whether this repair would resolve the issue. They also indicated that I would be responsible for all associated costs. Despite the presence of concerning symptoms, including abnormal engine noise and repeated warning messages, I was advised that General Motors would not approve an engine replacement unless the engine either completely seizes or fails both required diagnostic tests. At this time, my vehicle has only failed one of the two tests. As a result, I have been left without a reliable and safe vehicle, which is significantly impacting my ability to commute to work. This situation places me at risk of financial hardship and potential job loss. I am seeking a resolution that ensures my vehicle is properly diagnosed and repaired so that it is safe to operate.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730203April 9, 2026
ENGINE AND ENGINE COOLING
See attached document for complaint. INFORMATION, DETAILS, COMMENTS, DATES, AND NUMBERS ON RECALL 20211500 DENALI Recall Vehicle Information: All models of GM's with 6.2L gas engine (My personal truck I owned} • Recall date: April 23, 2025 650,000 + GM vehicles with 6.2L gas engine, years 2019-2023 • Manufacturer Recall Number: N2524944000 (letter issued by State of Washington Dept. of Licensing, PO Box 9020 Olympia, WA. 98507-9020 • NHTSA Recall Number: 25V274 • 2021 GMC 1500 Sierra Denali, x-tended cab, 4wh dr, 6.2 L gas engine • Vin #: WITH 6,400 MILES ON MY TRUCK May 15, 2025 • Went to local dealer, Becker Buick-GMC in Spokane, WA., to verify there was a recall on my truck and vin. #. Confirmed with there service department and sales person Jon Stone. • I was informed that the Dealership, service dept., and salesman Jon Stone, and Sales Mgr. Cameron could only say the following: "GMC DOES NOT have the tools made yet to verify if the engine will need to be replaced and would add me too the list and keep me posted." • I was informed at this time that t he issues with the engine were: engine could stop and start again at random; the engine start to smoke and stop; the engine could catch fi re whether it was running or not, or the engine could do ALL THREE things. • I was told to just keep driving the truck but watch for any of these issues. May 28, 2025 • Stopped in local dealer, Becker Buick-GMC, again to see if any updates. • Told GMC still had done nothing to develop the necessary tools to evaluate the engine and had no date to report or share with me on when they co uld. • Again, I was told to keep driving the truck and if I had a problem, Becker Buick would come and tow me. • Salespeople did ask if I wanted to just buy a new truck several times. They were impressed my truck only had 6400 miles on it and in such excellent shape. This was to be my retirement truck. June 5, 6, 7, 2025 • I visited several car dealers in the Spokane, WA. Area. Ford, Chevy, Dodge and Toyota. While looking at new/different vehic
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730295April 9, 2026
ENGINE
The engine suddenly seized and now needs to be replaced. Regular oil changes, no leaks, and the engine just seized up and won't run. 5.3L V8.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729845April 8, 2026
UNKNOWN OR OTHER, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
“Service Driver Assist System” message appears every time I turn on my truck. Vehicle would randomly break when driving at slow speeds and show the forward collision alert even if no objects/ car are approaching or being approached. I am concerned about my safety because those sudden hard-breaks could cause an accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729849April 8, 2026
ENGINE
We were driving down the interstate at speed and the Engine shut off unexpectedly. The truck flashed a notification on the dash asking to turn it back on. Pressing the on button would not turn the truck on. The tow truck company also couldn't get it to shift into neutral so he had to drag it up the tow truck After getting towed to a dealership they told us they had no one to look at it that day so we got a hotel room 5 hours from home and in the morning they said the engine is siezed and will need to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729851April 8, 2026
ENGINE
Engine seized while driving. vehicle was inoperable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729861April 8, 2026
STEERING, SERVICE BRAKES, POWER TRAIN
Engine failed at high speeds on interstate. When my Truck shut off the steering and braking system went out and getting to shoulder of interstate was difficult with others around me. Express lanes were limited on emergency shoulder therefore my truck was partially on the high speed driving lane. 911 was called out to block freeway lane. Check engine light blinked right when truck shut down.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729967April 8, 2026
ENGINE, POWER TRAIN
I have a 2021 GMC Sierra 1500 AT4 3.0L diesel pickup truck with 98,500 miles. The coolant control valve failed on my vehicle and for some reason it is not covered under GM's special bulletin that covers this part 15yr/150,000. Ridiculous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729705April 7, 2026
POWER TRAIN, SERVICE BRAKES
1- transmission issue, it’ll occasionally slip from 1-2 gear and engine rpm’s will shoot up making it when you release the gas pedal it’ll kick into second gear it’ll also do minor kicks into other gears (8l90 transmission) 2- breaks issue, unsure of what the problem is but at very low speeds like parking or going in slow traffic the break pedal will get really hard making you have to press extra hard for it to break, releasing and pressing again doesn’t help either
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729716April 7, 2026
POWER TRAIN, ELECTRICAL SYSTEM, STEERING
This is in addition to the first report regarding my 2022 GMC Sierra SLT with 10-Speed Transmission. I had previously filed a complaint (NHSTA Tracking# 11728418.) regarding the OnStar and Internet quitting on me. Which was the Serial Gateway Module. I had reported that I was put off many times regarding a loner vehicle so i could get back and forth to my Oncologist for treatment of Head and Neck Cancer. And years of follow-up appt. with specialists Gastrointerologists and Cardiologist for serious issues incurred from 168 intense radiation treatments and Chemo. I had also taken my truck in for all scheduled maintenace intervals specified by the dealer and the manufacturer. "REPAIR ORDER GCCS504610" I had to leave it in the shop for 30 days for a defective Exhaust System, Radio, Charging Port, Remote Key Fob not able to unlock the truck so i could get in. And some other warranty/recall issues regarding my A/C blower and Seat cushion blower motor and Trailer Brake Switch, Fog Lamps running while daytime running lights were on - All Safety issues, My truck was @ Beck & Masten GMC for 30 days during these repairs, recalls and warranty. Will attach INVOICE 123532 to show consistant sheduled maintenance per GMC guidelines. Waited while this service was performed. "REPAIR ORDER / INVOICE 140542" Again my truck was back at Beck & Masten GMC (19 days) for the Serial Gateway Module and Radio not working AGAIN! Again, no OnStar, No Internet, No GPS. And, I reported the oil consumption and Add OIL light coming on; which was dismissed as idling too often (. I had to add 2 qts of oil between scheduled oil changes(The truck had only 13754 miles at this time) The LAST time I had anything to do with Beck & Masten GMC South was when I spent over months waiting on a loaner vehicle because I needed them to please look into still having an oil light coming on. And slipping and front end wobble just before the slipping/clucking and high RPM's that were dangerous- accident!!
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0

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