GMC Sierra Complaints

15,732 consumer complaints on file.

#11590276May 22, 2024
SERVICE BRAKES, ELECTRICAL SYSTEM, POWER TRAIN
It keep having this issue constantly every minute saying trailer brake system
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11590111May 22, 2024
UNKNOWN OR OTHER
I sent a certified 3 page letter along with 4 pages of supporting documentation on April 25th, it was received and signed for on 4/30 at 10:16 am. I have still not received a response. I called to follow up and the reference number is #1516488, they told me to file the case online. I have copy of the letter I can resend via email or upload here.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11589780May 20, 2024
ENGINE, POWER TRAIN
Had two lifters collapse and fail. Replaced transmission twice due to torque converter failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11589523May 19, 2024
SERVICE BRAKES, ELECTRICAL SYSTEM
The in cab brake controller does not work with electric over hydraulic trailer brakes. In my research to diagnose and fix the problem I find out GMC has known about this for years and has done nothing to correct. I pulled code C1114 and GMC issued a bulletin for part number (K58-036-00) which I purchased and still did not correct this issue. In short there are many 3500 trucks out there running with no trailer brakes. Here is the worst of this problem. If brakes are tested at a stop they appear to work perfectly however once driving this is when the error code is delivered to the truck so the brakes work at a stop when not needed and do not work under driving when they are needed. GMC has ignored this for years and after spending more of my hard earned money for a fix that did not fix the problem. Below I had to choose a date however this has been an issue since first purchase December 5th 2023 to present.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11589260May 17, 2024
POWER TRAIN, UNKNOWN OR OTHER
I am on my 4th radiator and 3rd thermostat. August will be 1 year ! 2014 models are covered 2015 (like mine) is not covered. Transmission has shifted like crab since day of purchase 3 years ago. I am told it is a known issue from the factory with no solution. Truck also had a weird tick sense day one which turned into 2 failed valve springs. I have had 2 ball joints FAIL 1st time a month after purchase in my driveway. Second time 2000 miles later same side on my street
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11589156May 16, 2024
STEERING
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving approximately 15 MPH into oncoming traffic, the vehicle lost power steering functionality. The contact used excessive force to maneuver the vehicle. There were no warning lights illuminated. The contact became aware of NHTSA Campaign Number: 18V586000 (Steering). The dealer was contacted, and it was confirmed that the vehicle had previously been repaired under the recall and could not be repaired a second time under the recall. The vehicle had not been diagnosed or repaired. The manufacturer was made aware of the failure and confirmed that the VIN was no longer under recall. The failure mileage was 123,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11589086May 16, 2024
LATCHES/LOCKS/LINKAGES
The contact owns a 2022 GMC Sierra 1500. The contact stated that while the vehicle was being driven or parked, the tailgate was inadvertently unlatched. There was no warning light illuminated. The vehicle was taken to a local dealer where the failure was linked to NHTSA Campaign Number: 24V060000 (Latches/Locks/Linkages). The vehicle was not repaired. The manufacturer was made aware of the failure; however, the contact was referred to the NHTSA Hotline. The failure mileage was 141,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11588888May 15, 2024
UNKNOWN OR OTHER
Vehicle is shaking at highway speeds
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11588953May 15, 2024
AIR BAGS
The contact owns a 2016 GMC Sierra 2500 HD. The contact stated that while driving at 64 MPH, he crashed head-on with a 350-pound deer. The deer went underneath the vehicle, and the driver ran over it with the passenger front tire. The driver's side air bag did not deploy. The air bag warning light was illuminated. There were no reported injuries or fire. A police report was filed. The contact was able to drive away from the crash. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 85,379. Additionally, while driving in the snow, a motorcycle crashed into the rear of his vehicle. The driver-side front air bag did not deploy. There was an abnormal sizzling sound, and smoke was detected. There were no warning lights illuminated, There were no reported injuries, fore or police report. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was contacted. The failure mileage was unknown.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11588692May 14, 2024
ENGINE
The coolant control valve is faulty and needs to be replaced. GMC and the dealership know about the issue (Bulletin No. PIP5791), but are not fixing it in a timely manner. This is a safety concern as the system will automatically reduce engine power, which is a major concern when towing and/or in mountainous terrain.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11588436May 13, 2024
ENGINE, ELECTRICAL SYSTEM
The component that has failed is the engine coolant flow control valve AC Delco part number 55516369. Unfortunately the part is still installed on the vehicle. It has been taken to a dealer and this is a known issue but no recall has been issued. The check engine comes on sometimes but not always, sometimes the pickup has plenty of power to drive and sometime it will barely pull itself, all in the same trip without shutting the ignition off. The symptoms first started in December of 2023, but were sporadic, now it is nearly everytime the pickup is started. It is extremely dangerous to drive this vehicle when it has a problem. You cannot tell if it will accelerate normally or is you will push the pedal and it does nothing. The part to repair the problem is on backorder and no release date is yet available. We have been waiting for 3 months and still no word on when this will be repaired.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11588287May 12, 2024
SERVICE BRAKES, ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
My truck had smoke rolling out at work when I noticed it. Tried to put it out it Burnt my hands ! destroyed the inside I had it towed and insurance investigator said it was do to a brake controller for the trailer. And I took it to get estimate and the service dept said it was do To brake controller my truck was totaled my wallet toast my coat was toast my I phone my deposit my truck i drove daily to work out of and personal. General Motors would not help I called the. First. Then I was frustrated called my insurance they started a claim and low balled me now I lost 2 months of work bills stacked and low ball price on what the offer was) and haven’t gotten one yet. Called gm back they said I had an active claim they woundenr help it’s there defect I lost my job my mind etc on this. Two investigators state the same thing even there service dept. A gm service dept said the same thing. No warning indicators at al I will never buy another truck. The safety issue is people driving around not knowing. The 2500 and 3500 have them. Looked it up the plant that made my truck left the parts for manufacturing outdoors they got wet. It’s on the internet people r gionbg to get hurt. Lucky I was outside when my was on fire. Please help on the matter. Thank u
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11588113May 10, 2024
ENGINE, POWER TRAIN
#1 While merging onto the highway, the vehicle began to shake violently and have a sudden lose of power due to a misfire on cylinder 6 and 4. I was unable to merge onto the highway as the vehicle would not accelerate almost causing me to be hit from behind. I was able to get the vehicle off to the shoulder to avoid an accident as it was barely able to stay running and the CEL was flashing. The failed parts (AFM lifters/push rods and VLOM) have been removed from the engine and saved for review. #2 My family's safety was put at risk as the vehicle had a sudden lose of acceleration while trying to merge on the highway almost causing us to be hit from behind. #3 I spoke with my local GMC dealer and explained the situation and diagnosis that I have completed on the vehicle. That wanted me to pay out of pocket to tow the vehicle in and would not cover anything as the vehicle is barley out of powertrain warranty (72695 miles). I have been an engineer in the automotive industry for almost 10 years and can properly diagnose a vehicle and the issue it has. Trouble codes were provided along with pictures and videos as evidence. I understand when something is a safety issue and needs to be addressed as this is a common issue with GM 5.3l and 6.2l engines. I then spoke to GM corporate (Mandy, case# 9-12424996557) and once again they wanted me to pay for everything out of pocket even though this is clearly a safety concern with their product and the diagnosis had already been completed. This vehicle has all the maintenance records since it rolled off the showroom floor, proving that the failure is not related to neglect or poor maintenance of the vehicle. There is very clearly a design issue or manufacturing issue on this components. #4 Components are available for inspection by mfg. #5 There were not warning lights or any other indicators prior to the failure. Oil pressure was at 40PSI and engine temp was ~200F. All within the normal operating windows of the vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11587778May 9, 2024
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
My wiring harness which affects all systems. I was on the Interstate when out of nowhere any and all warning lights came on. The power was cut and rapidly slowed down. I also pulled into traffic and the truck just lost power. The problem was confirmed by dealership. The vehicle was inspected by dealership and wiring harness was the issue. The issues appeared out of nowhere. All the warnings lights came on at once. There has been numerous issues with this part and it’s even recognized by just.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11587853May 9, 2024
SERVICE BRAKES
On a recent road trip my family and I experienced an issue with the Brake Assist on my 2016 GMC Sierra. When I returned back from our vacation I took the vehicle to a 3rd party mechanic that I trusted to perform diagnostics. He advised that I would need a new vacuum pump and stretch belt to correct the issue. Upon receiving this information I advised him to move forward with the repair. What I didn't know was that Special Coverage N182202780 covers this exact repair from GM at no cost to the customer. I followed up with GM to see if I could recoup any of the cost and I was told no because I didn't get the work done at a GM dealership. I find this to be extremely frustrating as I did not know there was a special notice that would have covered this defect, and if I had I would of taken the vehicle to a GMC dealership. I feel that GM should reimburse me for the defect that was known even if I had the vehicle serviced at my chosen mechanic. Any help would be greatly appreciated
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11587865May 9, 2024
SUSPENSION, STRUCTURE:BODY, UNKNOWN OR OTHER
The frame is completely rusting out.There needs to be something done about this please
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11587877May 9, 2024
SERVICE BRAKES, HYDRAULIC
The contact owns a 2017 GMC Sierra 1500. The contact stated that on several occasions while driving at low speeds, the brake pedal was depressed, and the pedal remained on the floorboard. Additionally, the vehicle failed to slow down as intended. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 50,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11587719May 8, 2024
ELECTRICAL SYSTEM, ENGINE, STEERING
I know this is a well known issue with these trucks. Have had issues with power steering not working at low speeds which they claim it’s do to low voltage. This has happened numerous times and then on May 3rd I went to back into my driveway off a busy state route with hills on each end of the road. Put my hazard lights on let three vehicles pass and then I turned the wheel and gave it gas soon as the truck got into the middle of the road it shut off. Everything stopped working no hazard lights for about 10seconds and then I had to put the truck into park turn ignition key off and then back on to restart the truck. Again this is all do to low voltage from what everyone else has said with the same issue. There are no warnings what so every even the voltage meter is fine and the truck doesn’t hesitate at all it’s like someone disconnected the battery. I’m sure there is a way for GM to reprogram the pc for the voltage drop. At least have something like radio go out or ac, heat other than the engine and entire electrical shutting off. Something like this is going to get someone killed and GM should be held accountable for these problems.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11587154May 6, 2024
VEHICLE SPEED CONTROL, POWER TRAIN, ENGINE
2018 gmc Seirra 1500 8 speed transmission. Making unsafe conditions while driving transmission tends to make hard shifts, jerks, hesitation when moved into gear, gets worse when stopping momentarily at stop lights and then trying to accelerate vehicle will not move. Makes hard shift and jerks then will accelerate in an unsafe manner.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11586875May 3, 2024
STEERING
The power steering started going out and then comes back on, which is very dangerous!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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