GMC Sierra Complaints

15,732 consumer complaints on file.

#11558129December 2, 2023
SERVICE BRAKES
Braking system is malfunctioning while driving at slower speeds. It has malfunctioned while backing up and almost hit another vehicle. It also malfunctioned while coming to a stop light. Brake system is not working as it should and is feeling spongy upon braking. It feels like the brake pedal is all the way to the floor before it will eventually stop the truck. In researching this problem, there was a recall on the secondary brake system back in Feb of 2020. I bought the truck in June of 2020. I never got any information that there was a recall from the dealership I bought it from. I am unable to drive my truck due to this problem. I have not taken the truck to a GMC dealer as of yet but planning to.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11557941December 1, 2023
SERVICE BRAKES, ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER
The contact owns a 2019 GMC Sierra 1500. The contact stated while driving 45 MPH, the service brakes were inoperable, and the vehicle experienced phantom braking. The vehicle came to a complete stop on the highway. The vehicle was towed to an independent mechanic however, the failure could not be duplicated. The contact called and made the dealer aware of the failure. The contact stated that the failure was intermittent. Additionally, the speed odometer was inoperable. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 70,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11557978December 1, 2023
AIR BAGS
The passenger presence module does not work. The deal said if it was involved in a crash there would be a possibility the airbag on the passenger side would not go off because it can't register if someone is sitting in the seat or not.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11557982December 1, 2023
ENGINE
Oil pressure pump failed to keep pressure despite regular maintenance.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11557590November 30, 2023
PARKING BRAKE:DRIVELINE:HYDRAULIC:ACTUATOR
The contact owns a 2021 GMC Sierra 2500. The contact stated that on several occasions while in park(P) with the parking brake engaged, the parking brake warning light was illuminated. The contact also stated that the parking brake would not disengage until the vehicle was shifted into reverse(R). The contact stated that he observed a loud banging sound coming from the rear of the vehicle when the parking brake was finally disengaged. The vehicle was taken to a dealer where it was diagnosed that the driver’s side rear actuator needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 51,248.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11557188November 28, 2023
WHEELS, UNKNOWN OR OTHER
5 days after purchasing and While driving down the interstate at 80 mph, there was a loud clunk at the same time the back wheels locked up for a split second, long enough to burn the tires and throw everyone in the vehicle forward then the vehicle continued on. It happened three more times, we trailered it and brought it to the dealer. They said nothing is wrong with it. However, I was able to locate the previous owners who stated they'd been bringing it to several dealerships to have it taken care of for the past six months and every dealer said that nothing is wrong with it. But the same thing happened to them for six months. One mechanic in Idaho even replaced the motor trying to fix it and it still continued. The dealer I purchased from never mentioned it having a new motor, and I pulled the Carfax report and it shows several times it was in the shop including the motor replacement, but the shop visits aren't detailed it just says maintenance. Several mechanics we've spoken with say it's in the transmission, drivetrain. But the dealer refuses to do anything unless it'll replicate when they test drive it. But they don't test drive it on the highway or for a long enough time. Multiple owners now in multiple states the same problem and no one will help. This could be a catastrophic incident if the roads had been a little wet or someone was close enough behind us when it happened it would have been a serious car accident, if not worse. I am not sure you can help but Im reaching out to everything that I can find.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11556909November 27, 2023
POWER TRAIN
I have a 2018 GMC Sierra 1500, it is over 5 years. So we all know our warranties are either expired and meaning out of pocket expenses will come. I mainly drive back and forth to work so my vehicle only 43,924 miles to be exact. So tell me why GM allows us to purchase a vehicle with defect oil in the transmission knowing the Torque converter will start shuttering causing some of us to purchase a new transmission and if we lucky a transmission flush. So yes I took it to the dealership causing me over $850 to have a diagnosis, computer hook up, and a transmission oil flushed and replaced. I was told this is an 45000 miles issue and it's not considered a safety issue. Personally, if I didn't know better I could had gotten rear ended and yes this should be a safety issue. Our family would like this issue addressed and be reimbursed for my expenses. Thank you!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11557034November 27, 2023
ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:FILTER/SCREEN, ENGINE
The contact owns a 2014 GMC Sierra 1500. The contact stated while driving approximately 65 MPH, the vehicle lost motive power and shut off. The failure recurred on several occasions. There were no warning lights illuminated. The vehicle was taken to an independent mechanic and the contact was informed that the failure was due to the oil pump, which had gone into low-pressure mode and shut down the engine. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, and the contact was informed that the repairs were not covered under a recall. The manufacturer referred him to NHTSA. The approximate failure mileage was 186,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11557049November 27, 2023
ENGINE
timing chain failure, timing chain components are available for inspection. Costly premature repair/failure. Could leave occupants stranded in unsafe environment which could lead to death. The vehicle has been diagnosed by the dealership and OEM manufacturer has been notified. There was a warning lamp.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11556611November 24, 2023
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
While driving, on its own, the radio volume surged to 100%. All radio controls were unresponsive, and the volume was maxed-out.. Volume bar on the console display was reading 100%. Was unable to turn the radio down or off. Issue did not resolve until I drove home and turned the vehicle off.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11556617November 24, 2023
ELECTRICAL SYSTEM, STEERING, POWER TRAIN
At slow speeds, multiple times, I have had the truck completely have an electrical failure and the engine shut off. I have replaced the negative battery cable and ensured all connections are good. This has happened on streets when turning and in parking lots. When this happens all of the screens in the truck flicker and the service stabilitrack light comes on and then everything goes out, to include the engine. Myself, my family, and other drivers have been out at risk when the truck completely shuts off on a street. The dealership has not been able to give me an answer. There are many forums online where the 2014-2018 year models of this and similar GM vehicles have had the same problem. We need a specific fix for this before someone gets seriously injured or killed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11556441November 22, 2023
ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
The contact owns a 2024 GMC Sierra 2500. The contact stated while towing a trailer and driving down a hill at approximately 40 MPH, the integrated trailer braking system error message was displayed, and the trailer braking system failed to activate. The vehicle was later taken to the local dealer who was unable to replicate the failure and failure was found. The dealer later informed the contact that the solar panel system on the trailer might have caused the integrated trailer braking system to malfunction. The contact stated that after turning off the solar panel system the failure persisted. The cause of the failure was not yet determined. The manufacturer was not contacted. The failure mileage was 800.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11556481November 22, 2023
UNKNOWN OR OTHER
The rear window of my 2020 GMC Sierra developed major water leaks across the entire window in 2021. GM has documented this issue with a service bulletin and the dealership has documented their resolution to the first repair under warranty. GM knows of this manufacturing issue and continued to install a faulty back window. Not only did the back window leak large amounts of water into the cab causing a potential dangerous mold issue, the security and integrity of the back window breaking or falling onto rear passengers is a major safety hazard. The integrity of the back window falling out into traffic is another safety hazard to consider. GM issued a service bulletin for leaking back windows for their Sierra trucks due to the known problems. GM has documented their problem and remedied a quick inexpensive solution. Many other GM Sierra truck owners have documented their issues and frustration with GM, and the BBB. GM has invested this issue and found the rear window plastic frame was installed or will develop stress cracked in the frame. GM’s remedy is to use a silicon window caulk and apply the silicon between the outside top section of the glass to the cab. This did not address the safety aspect of the situation. It only delayed the issue temporarily until vehicle owners were out of warranty. GM’s solution usually only last for one or two years before the issue develops again. After GM and the dearship siliconed the rear window per the service bulletin in 2021, my vehicle once again developed the same leak as before. The dealer ship once again inspected the rear window, but this time told me the issue and replaced the entire rear window because of the “stress cracks”. It’s amazing that GM wants to replace the rear window at the customer’s expense since I am out of warranty. It preposterous that GM knew of this safety issue and created a temporary correction that would last a short time until vehicle owners are out of warranty and stick them with a bill.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11556351November 21, 2023
FUEL/PROPULSION SYSTEM
Truck has a CP4 injection pump and they go bad and cost $15,000-$20,000 to repair and if that happens I owe money on the truck and would have to get a loan or figure something out and still have to make a payment on something I can’t even drive! They need to recall it and swap them out to a CP3 and be done with it. Why wait until it cost 10s of thousands of dollars when they can get it done for $3,500 at the most?
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11556046November 20, 2023
ELECTRICAL SYSTEM
The truck completely shut off while making a turn in town. I didn't have any control of the truck, steering or braking ability. In a attempted to restart the truck or regain steering and braking, I cycled the key to no avail. I then urgently tried putting it into neutral, and cycling the key again. The truck started and I regained control. In the 5-10 seconds that passed while the vehicle was out of control, the vehicle traveled over the curb and then onto the sidewalk. It is miraculous that I didn't cause an accident or cause injury to pedestrians. I was shaking. This event was the scariest thing that has ever happened to me in a vehicle. A blessing for sure. In not the clearest frame of mind, I drove the vehicle back to my home. It is parked and I won't drive it until it is repaired. Upon getting home and calming down, I googled this event. The Google search indicated that this scenario is very common in gmc trucks between 2014-17. The cause is apparently faulty battery cables and/or corroded grounding points. I do not understand why there isn't a recall or safety bulletin to inform vehicle owners of this issue. I could have easily killed someone. I passionately feel that action needs to be taken on this series of gmc trucks to prevent a deadly accident!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555867November 19, 2023
SERVICE BRAKES
Electrical short on brake booster performance error code c0021 while operating vehicle . Brake pedal became stiff and higher than where I had it . Vehicle making hissing noises and will no longer start due to this error. Safety concern this is not part of a recall list. I nearly crashed. I had to utilize emergency brake.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555796November 18, 2023
STEERING, ENGINE, POWER TRAIN
My 2018 Sierra began experiencing severe shuddering while driving down the road. The dealer said it was caused by moisture getting into the transmission fluid and contaminating it. In my ownership of dozens of vehicle's this has never happened before. This formerly inexpensive minor fluid change requirement morphed into a $618.00 major surgery just to fix a problem that should have never occured. If the fluid was contaminated by moisture as the dealer explained, it's a design defect which caused it and nothing I have ever done. I am still unsure as to if the transmission or torque converter may be damaged. The manufacturer should be liable for the cost to fix this not me!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555831November 18, 2023
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, BACK OVER PREVENTION: WARNINGS
I put my truck in break. Service mode to replace the brake pads. I began changing the pads And could not get the piston to retract all the way, I hooked uon a c clamp to retract the piston. In the event i moved the rotor to another spot and the brake service mode turned off and the piston extended. My fingers nearly got caught in the caliper. When put in brake service mode, it should not automatically extend when turning the rotor. Someone will get hurt bad at some point in a swrvice garage or at home when wirking on brakes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555852November 18, 2023
STRUCTURE:BODY
Rear window is leaking water inside cab and may cause mold
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555635November 17, 2023
AIR BAGS
2014 GMC Sierra 2500HD. My dash has started to crack around the passenger airbag and driverside gauge cluster. Dash material is brittle and serves as a hazard should the airbags deploy during an accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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