GMC Sierra Complaints

15,732 consumer complaints on file.

#11629672December 9, 2024
AIR BAGS, SEAT BELTS, LANE DEPARTURE: BLIND SPOT DETECTION
I face this problem
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629735December 9, 2024
ELECTRICAL SYSTEM, ENGINE, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Truck thinks I’m about to run into something and slams on its brakes. Last time it sent my sister to the hospital to get 6 staples in her head. Digital cluster goes on and off as well as the infotainment center. Transmission bangs and shifts horribly. 900 miles on the truck with a check engine light and transmission warning.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11629474December 8, 2024
EXTERIOR LIGHTING
The reverse or backup lights do not properly illuminate, as the angle does not allow for viewing dangers behind at night. The lights are angled to aim way too high, and the lights are aealed. No way to adjuat. An adult standing just three to five feet behind truck, the lights illuminate at chest level, meaning a small child could not be seen at all, even with the rear view camera. Speaking of the camera, it not longer displays low light situations. People are going to be injured or killed because of these lights, or lack thereof of. On researching, this is a known defect since GMC went to LED tailings in the 2024 1500. This problem was not in my 2024 3500 as they use different lights. This is a dangerous situation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629372December 7, 2024
STEERING, ELECTRICAL SYSTEM
After recall the problem got worse
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629379December 7, 2024
TIRES
Concerning Goodyear Wrangler Trailrunner AT P275/65/20 tires that came stock with my 2022 GMC Sierra 2500HD, which currently has 42,000 miles on it. While driving a round trip of no more than 30 miles the evening of 11/29/24, I noticed a slight repetative jaring motion, which I initially attributed to a potential transmission issue. The bump rapidly worsened halfway though the drive. Upon inspection at the time, I could not see any visible damage to the tire. However, the issue escalated aggressively during my return home, resulting in the tire blowing out and detreading entirely. This failure caused significant damage to the body of my truck, amounting to an estimated $3,500 in repair costs. I believe this incident is due to a defect in the tire, as such occurrences are highly uncommon and unexpected from a product of your reputation. I have oil changes as recommended by the trucks service maunual and with ample tread left on the tire and good scores of inspection it begs the question on how a tire could fail so abruptly. I have 3 other tires with ample tread which should last at least another 10k miles but I'm gravely concerned with continued use of them for fear another blowout could cause a fatal accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629192December 6, 2024
STRUCTURE:BODY
Upper trim piece of grill broke off while traveling down roar at 60mph. Part struck my windshield and flew over cab of vehicle and impacted the vehicle traveling behind me. Could've caused a much more serious accident!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629310December 6, 2024
SERVICE BRAKES
I was backing my boat down the ramp and the brakes were giving out. I know this was a recall issue, in the past, that I had repaired. Clearly, they repaired it with the same faulty part because it has happened again. When I took it to be repaired they said I had to pay for it this time. The issue wasn't resolved but only deferred until later, with a temporary fix. I could have ended up in the river and drowned. Paying the dealership to fix a safety issue caused by their defective parts is ridiculous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628985December 5, 2024
STRUCTURE:BODY
Upper trim on front grille fly off while driving. All clips were broken, very thin plastic. This piece of trim nearly hit the vehicle behind me while driving 45-50mph. I've noticed there are many owners experiencing the same issue. The trim piece is separate from the grille but GM will only sell the full grille replacement. The upper piece needs to be redesigned for safety purposes and replaced on all similar models.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629100December 5, 2024
STRUCTURE:BODY
While driving home from work, on the highway. Travelling 68 mph. The upper moulding on the front grille blew off, struck my windshield and landed on the highway behind me. Vehicles behind me had to swerve and slow as a result. I waited for a safe time to pull over and turn around to go back and retrieve the piece. Once retrieved, I could see the plastic clips had broken. Some are still missing. Wry dangerous situation, luckily it was not dark outside, otherwise I imagine other vehicles behind me may not have seen it, could have caused a bad accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629106December 5, 2024
SERVICE BRAKES
While driving on the highway a message came up stating Brake System Failure, top speed 62 mph. It also came up with other error messages, like service traction control. I completely lost any braking capability and had to let it slow down & pull off to the side of the highway. I shutoff the vehicle and then restarted it & everything seemed fine. I took it to the dealership right away, where they said it had about 20 communication codes across different systems. After 3 days of them having it, they have no idea what is going on. They are now test driving my truck to see if they can get it to happen again (which could kill someone if it does happen again).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628811December 4, 2024
ELECTRICAL SYSTEM, STRUCTURE:BODY
Tailgate releases on its own while parked, without the use of the switch. Tailgate released on its own with my trailer attached while parked on many occasions. The result of the Tailgate releasing caused damage to the upper section of the Tailgate, the "kicker speaker system" in the Tailgate and Tailgate switch located on the upper section of the Tailgate. There also have been multiple times when attaching the trailer that the Tailgate has released and struck me in the head. The Tailgate also fills with water during rain, and carwashes. The damage caused by the Tailgate releasing is a dent on the upper section of the multi-pro Tailgate and rust and malfunction of the " kicker speaker system " as well as the occasional hickey and headache on my head. The Tailgate has filled up with water since I purchased it new in December of 2020 which I believe has been electricly shorting the Tailgate switch/button releasing the Tailgate randomly. Due to my particular 2020 GMC Sierra 1500 AT4 CarbonPro having the " kicker speaker system " in my opinion makes the Tailgate so much heavier than one without it that it made the damages such as the dent in the face above the Tailgate switch much worse than trucks without it also causing more water to enter the Tailgate causing more damage to the switch and components of the " kicker speaker system ", such as the amp and buttons for it not to mention my head on several occasions.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11628813December 4, 2024
SERVICE BRAKES
Seems to be a known problem according to a google search but brake fluid leaking from brake pedal onto drivers floor mat. Seems to be a bad brake booster according to google and happening for some at a few weeks to a couple months old in the newer ones. I noticed first on my truck around 58,000 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628822December 4, 2024
FUEL/PROPULSION SYSTEM, POWER TRAIN, VEHICLE SPEED CONTROL
Shuttering while in motion at a speed of 35mph or above. My 2020 GMC SIERRA 1500 AT4 CarbonPro while driving at or above speeds of 35mph experiences a hesitation and severe Shuttering while trying to maintain any speed of 35mph or above. The hesitation causes extreme vibrations and hesitation when lifting or applying foot to the accelerator. This happens in any drive mode also with cruise control on or off as well as shifting into low and being in any gear trying to prevent it. It also does this on any road and condition. It feels like a slip in the transmission or torque converter, possibly could be the rear end or variable valve timing as well. And when taking of from a red-light or stop sign it slips as if the truck has lost traction, but it hasn't. This is very dangerous and could be the cause of a serious accident when trying to accelerate. If your traveling at hwy speeds it feels as if the brakes are being applied and the tires are going over a washboard which could cause a collision, tire wear, or driveline damage.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628827December 4, 2024
ENGINE
Coolant control valve failure. The 3.0 Duramax Diesel engine coolant control valve is known for failure. The part is not available and it has no availability time frame from GM. Vehicle goes into reduced acceleration mode hindering driver from being able yo accelerate safely in traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628858December 4, 2024
ENGINE
Coolant control valve has failed. Part is back ordered and availability unknown. Truck goes into reduced power mode which makes merging into traffic unsafe.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628860December 4, 2024
WHEELS, SERVICE BRAKES
Tires locking up while driving. NOT SAFE TO DRIVE
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628896December 4, 2024
ENGINE
The coolant control valve failed, and there is a recall for a software update for a valve issue in the transmission. The DEF system is flawed with the level being shown by approximate using a computer to calculate versus a level sensor or sending unit. My NOX sensor was replaced and the check engine light came back on for the same reason. It ended up being corrected by filling up the DEF.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628898December 4, 2024
ELECTRICAL SYSTEM, ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628909December 4, 2024
ENGINE
The engine blew up at 67,000 mile while driving down the road. Not sure what happened but there was no warning signs at all. The dealership said they couldn’t know for sure what happened but most likely the oil pump went bad. I have spoken with a few people that have had this same problem with the 6.2 liter engine. It needs to be looked into because this could have caused a major accident on the highway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628934December 4, 2024
POWER TRAIN
Vehicle torque converter broke internally at 76000 miles while on the highway, causing vehicle immobile while traveling at 55 mph. Almost rear ended trying to get off highway safely. Torque converter failure caused transmission to have to be rebuilt at a cost of $4,700. After doing some research it is a very common and defective problem with trucks using 6l80 transmission.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra