GMC Sierra Complaints

15,732 consumer complaints on file.

#11468836June 12, 2022
POWER TRAIN, SERVICE BRAKES, ELECTRICAL SYSTEM
I was stopped at a fast food drive thru and then I tried to go to the next window and the truck wouldn’t move at all it will just rev so I put it in parked turned off the truck and turn it back on put it on drive and was able to move for like 40 ft then it did it again so I had it towed to my home
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11468513June 9, 2022
POWER TRAIN
Transmission has been skipping since 35000 miles, it does it when driving more than 35 mph.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11468457June 9, 2022
POWER TRAIN
Transmission experiencing hard shifts, especially at low speeds. Vehicle "jumps" forward with the hard shift. Took to dealer for service. Dealer indicated that GMC used the wrong transmission fluid during assembly of the vehicle. This was a known problem within GMC.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11467932June 7, 2022
SERVICE BRAKES, ELECTRICAL SYSTEM
Trailer brake modulator on 2018 GMC Sierra does not consistently signal trail brakes to work when needed on our 7,500 pound RV trailer. GMC dealer eventually found that the battery cables were undersized as installed with the factory towing package on the 2018 GMC Sierra. The undersized battery cables do not consistently deliver adequate voltage to the trailer brake modulator on the GMC Sierra, so inconsistent electric brake function for our 7,500 pound RV trailer. Dealer had difficulty diagnosing the problem as being the wrong factory-installed battery cables to go with the factory-installed trailer towing package. So it cost us $1,600 to have the GMC dealer correct a problem caused by the GMC factory installing undersized battery cables. Fortunately, this did not result in a collision for us, but it might for someone else. Our 2018 GMC Sierra kept sending vague, randomly timed warnings to the dashboard to "Check Trailer Wiring." Very frightening, dangerous and costly (for us) mistake by GMC. Will the brakes work this time, or fail on the way home? Problem started in 2021 RV season, but took awhile for us to recognize the need to take to the GMC dealer for them to diagnose base cause. Took time for us to experiment changing trailer wiring connector on bumper and trailer brake control on the dash. Work for awhile, then fail. Work for awhile, then fail. Arrrrgh! Ask GMC to put more adequate battery cables on ALL their vehicles, please.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11468057June 7, 2022
ENGINE
Engine lifters failure, caused ESC light to come on and check engine light and other dash lights. Lack of power from engine causing dangerous driving in traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11468083June 7, 2022
SERVICE BRAKES, ELECTRICAL SYSTEM, STEERING
Whenever driving I get a message stating that I need to service my trailer brake system. This is most likely due to cheap wiring installed by the manufacture. This has been going on for over a couple of months. Just recently, I was making a slow turn and my vehicle shut off on me and I lost control of my brakes and steering and all power to the vehicle which is a huge safety concern and I am unsure if they are related or not
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11467534June 4, 2022
POWER TRAIN
I have a 2018 GMC Sierra Denali. I started having problems with the 8-speed transmission at 18,000 miles. The vehicle has been to the dealership for a transmission fluid flush, a transmission relearn, a 5-week valve body replacement, two more trips to the dealership where the truck did not malfunction for them. I have had issues with an air leak on the driver side front door as well. That issue has not been resolved as well. I spent over $60,000 for the truck and have had nothing but problems. I have brought it to General Motors attention and all I would do is get a run around and no results. I was told that there is nothing more that they can do. I am beside myself and just sick as I do not know what to do. I bought a brand new vehicle in order to not have problems compared to a used one.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11467248June 3, 2022
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
When using adaptive cruise the brakes have engaged aggressively without cause. This has happened several times prior to my discontinuing the use of this option. I have not had it in for service yet (we just returned from vacation).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11467077June 2, 2022
POWER TRAIN
The vehicle jerks when I put it in reverse or drive. And when I'm going down the road while it shifts gears. It's be doing it since I purchased it (new). It was light at first but lately its been worse. I took it to the dealership a couple of months ago & they replaced something small & said it was fixed. But it still bad. My truck still only has 30K miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11467081June 2, 2022
ENGINE
I took my vehicle into the local dealership two weeks ago for the DPF emissions voluntary recall. Prior to the service I was getting 16.6 mpg for the 42000 miles on my truck. After the service, for the ~200 miles driven on same route and conditions commuting to and from work I have only been able to achieve ~13 mpg. There has been no other changes to my vehicle or operating conditions. When I took the vehicle in the advisor mentioned that it may take awhile for the service because “we have to download the update wirelessly.” While researching this issue the recall document specifically warns against wireless download of the update. I am not sure if this may be the result of not following the correct process or not and I am headed back to the dealer today. I also found several others posting on the diesel forums about similar significant loss of mpg after the update. Losing almost 25% fuel efficiency after the update is unacceptable and reflects the my previous experience of efficiency loss during an actual regeneration cycle prior to the update. The vehicle is acting as if it is running in a constant regeneration cycle. Unsure if this may lead to dangerous driving condition due to excessive stress and wear on the affected parts and engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11467195June 2, 2022
ENGINE, POWER TRAIN
1 June 2022, while driving, started hearing a clicking noise from front end, under hood. Took to local GM dealer, Mechanic drove with me, and he heard the noise, said he would order a part and safe to drive. So, I went home. 2 June 2022 started same vehicle, a very loud banging, clicking, shuttering noise from under hood, I took back to same dealer, Dealer said collapsed valve lifter. GM service notice says for dealer to fix under warranty. Apparently, a known problem with MANY 2021 GMC 5.3 L engines. PLEASE MAKE GM RECALL THIS ISSUE FOR REPAIRDS
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466910June 1, 2022
SERVICE BRAKES, ELECTRICAL SYSTEM
SERVICE TRAILER BRAKE SYSTEM - warning
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466913June 1, 2022
ELECTRICAL SYSTEM, STRUCTURE
The contact owns a 2017 GMC Sierra 1500. The contact stated that while the vehicle was turned off, the driver’s and passenger’s side running boards would erroneously activate and repeatedly extend in and out. The contact was concerned that the failure created a trip and fall, and pinching hazard. The vehicle was taken to the local dealer who was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was also notified of the failure. The failure mileage was 80,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466718May 31, 2022
SERVICE BRAKES, ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
The contact owns a 2021 GMC Sierra 1500. The contact stated that when pulling a trailer with electric brakes with their vehicle, a warning light stating to check the trailer would illuminate on their instrument panel. The warning light would also state that the electric brakes had disconnected and then reconnected shortly after. The failure would occur on a consistent basis. The main control computer system in the center where the radio is located would flash the message that the trailer brake gain not been recalled. The contact contacted the dealer who confirmed that the computer system was known to have an issue due to the interference between the electric brakes and the LAD lights on the vehicle, however, there was no recall. The vehicle had not been repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 21,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466803May 31, 2022
UNKNOWN OR OTHER
The AC condenser failed and AC will no longer work. This puts my family at risk during the hot summer days and can no longer use it to transport them due to extreme temperatures while not constantly in motion. Problem was confirmed by mechanic when I brought the truck in regarding AC no longer working. This is a known issue and I am requesting GM to finally release an official recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466833May 31, 2022
ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
The contact owns a 2016 GMC Sierra 1500. The contact stated while driving at various speeds, the service trailer brake system warning light illuminated with an audible sound. The vehicle was not taken to a dealer or an independent mechanic to be diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466673May 30, 2022
ELECTRICAL SYSTEM, ENGINE, POWER TRAIN
On 05/28/2022 my family was driving my brand new 2022 GMC Sierra 1500 3.0 Diesel at a rate of 60mph. There was suddenly a loud clunk (transmission) after proceeding a little further and getting speed back to 60mph there was a similar “clunk”… the diesel truck then immediately gained several various check engine / sensor lights all over the dash and went into Limp Mode. Speed slowly decreased from 60mph and finally as we were navigating our final left turn to our destination the truck would not accelerate thru an intersection subjecting our entire family to utter danger of oncoming vehicles. As a last ditch effort to save ourselves I put the truck in reverse and was able to reverse about 2mph. Then proceeded to shut the truck down and turn it back on to get out of the intersection, but the truck would not come out of park. Onstar emergency was contacted to call the police as we were in an extremely dangerous situation. This truck nearly caused our entire family to get in a very bad collision. The truck was stuck in the middle of the intersection for over 2 hours. The police even attempted to help getting the truck out of park , but was unsuccessful. The truck was scanned on site and had various codes including C1555 (x4) U0101 (x2) P25A2 U220F Collision assist light Check engine light Service Traction Control Light Service ESC The truck experienced catastrophic failure at only 319 miles. Day 4 of ownership. This vehicle needs to be investigated if it is failing this early on. There also needs to be a manual release for the parking gear. Truck has no way to be placed in neutral upon failure of the transmission relay.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466676May 30, 2022
POWER TRAIN
Truck has the 8 speed automatic transmission and at times makes a hard shift when pulling out from a stop. Truck currently shudders/shakes at around 1500 to 2000 rpm until the transmission goes into a lower gear. Feels like rumble strips in the road. Truck has only 32,000 miles on it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466591May 29, 2022
SUSPENSION
Passenger side leaf spring "failed"- the middle "stiffener" rear section broke off/ fell to the road (see picture below with leaf spring removed). Fortunately, I was turning into side street doing about 15mph negating any safety issues- things could have been much different if at highway speeds. The truck had some significant miles (125k) but they were 95% highway miles though I do considerable highway miles with "treated" roads over Washington state passes. Vehicle was repaired by Haselwood GMC/Chev Dealership in Bremerton, Wa. on 5/25/22. Maintenance/Repair supervisor chalked it up to routine wear and tear.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466505May 28, 2022
FUEL/PROPULSION SYSTEM, ENGINE
Lags when accelerating. Does not happen every time. Causes safety issues when in heavy traffic. The below date is when it started. It happens very regularly.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra