GMC Complaints

Vehicle has an engine knocking. The oil pressure will drop and will go into low power

The contact owns a 2022 GMC Terrain. The contact stated that while operating the vehicle, the service message was displayed, and the audible turn signal became inoperable, along with the collision warning and the On-Star feature. The cause of the failure was not yet determined. The dealer was notified of the failure, but no assistance was offered. The manufacturer was not yet contacted. The failure mileage was 22,000. The VIN was not available.

Transmission has a bad vibration at low RPMs under acceleration as well as slipping and hard shifts. A few times the transmission has locked up the briefly. It also runs very hot between 180 and 249 degrees. Have been researching this when I came across all the problems and recalls however nothing listed for my VIN

Three times in one month, four months after purchasing vehicle from dealership, the vehicle stalls while driving and will not restart. After running codes, each instance prompted a P129F code for the fuel pump driver control module. After the second incident, the vehicle was inspected by a qualified repair shop and no issue or stored codes were found. When the issues occur and the car stalls, the Check Engine Light and a Low Battery warning message can be seen on the instrument panel. When this issue occurs, the vehicle's gears cannot be shifted manually. The vehicle must be force shifted by hand, via transmission components under the hood, in order to place the car into neutral.

I was driving at 60MPH on the highway and my engine failed. The dashboard read "Press Start to Restart" and my engine RPMs were zero and nothing happened when I pressed the accelerator. I was lucky to be driving in the right hand lane and was able to get over. I had to stop the vehicle in a tight area with a guardrail on the right hand side of the shoulder and passing traffic on the left. Luckily, my engine restarted. I got off at the next exit and the same thing happened. I was able to restart is again and get it home and eventually to the dealer. The vehicle has 29,500 miles on it and the dealer says it needs a new engine (L87). They say it could take 3 months to get it.

WHILE TURNING INTO A BUISNESS FROM A HIGHWAY, THE LOW FUEL WARNING CAME ON EVEN THOUGH I HAD JUST FILLED THE TANK. UPON LEAVING THE BUISNESS, I STARTED THE TRUCK AND PUT IT INTO REVERSE AND THE ENGING STALLED. RESTARTED THE TRUCK AND PUT IT INTO REVERSE AGAIN AND IT STALLED AGAIN. RESTARTED AND TRIED GOING FORWARD AND IT RAN FINE. ABOUT 1 MILE DOWN THE ROAD THE LOW FUEL WARNING CAME ON AGAIN AND THE ENGINE STALLED WHILE TRAVELING APPROXIMATELY 35 MPH. AT THIS POINT I REALIZED THAT THE DOORS HAD UNLOCKED AND THE INSTRUMENT CLUSTER GAUGES KEPT SWEEPING UP AND DOWN. I TRIED TO RESTART THE ENGINE BUT IT WOULD NOT TURN OVER. IT ACTED LIKE THE BATTERY WAS DEAD. AFTER WATING SEVERAL SECONDS, I TRIED AGAIN AND THE ENGINE RESTARTED. I NOTED THE BATTERY VOLTAGE IN THE INSTRUMENT CLUSTER AND IT WAS NORMAL. NO WARNING LIGHTS ON IN THE INSTRUMENT CLUSTER. NO DTCS PRESENT WHEN CHECKED WITH A GENERIC SCAN TOOL. MY SAFETY WAS PUT AT RISK BECAUSE THE ENGINE STALLED WHILE DRIVING IN TRAFFIC. I HAVE NOT TAKEN IT TO THE DEALER YET AS THEY ARE NOT OPEN TODAY AND I WANTED TO REPORT THIS WHILE ALL THE DETAILS WERE FRESH ON MY MIND.

I do not know if this qualifies as a safety concern, however based on everything I have read, I wanted to report the incident since you have 39 cases already. My 2019 GMC Sierra Denali w 6.2l engine, and 60,000 miles, starting tapping on April 10, 2025. I brought it to the local dealership the following day to diagnose. The dealer reported that they located metal in the oil pan/ filter and said the engine needed to be replaced. After more reading, it seems my truck is one of the vehicles with the 6.2l engine that is failing in countless numbers. In all fairness, I did not crash, the engine did not seize and it did not create a safety hazard in my incident, so i apologize if this reporting is a waste of your time. Now i have been given an invoice for over $10k to replace the engine which is on backorder nationwide I'm told due to the number of engine failures. Obviously it is out of 5 year 60K mile warranty so I have to eat the engine replacement.

2020 GMC Sierra "Denali" 6.2L engine with only 64,000 all original well maintained at miles -- NO prior issues no unusual sounds or indications of any issues. Vehicle has had timely maintenance regularly. engine lost power and began shuddering severely. Immediately taken to GM certified dealership upon which charged almost $1600.00 for engine analysis. Diagnosis is cylinder # 5 had lifter collapse which in turn ruined the camshaft. Will have to wait 4 weeks for parts and since GM power train warranty (conveniently) only covers first 60,000 miles the total engine rebuild is out of my pocket. Total price $9,741.11. THIS IS RIDICULOUS AND GM NEEDS TO REPAIR OR REIMBURSE EVERY SINGLE OWNER THAT EXPERIENCES THIS ISSUE IN FULL. I think GM knew about this issues and hopes it will go away but this really pisses me and SHOULD everyone else too.

The motor blew up Safety I was going approximately 70 mph on interstate 80 could have been bad The vehicle is at a Chevy dealer The dealership has looked at it but has no idea when a new motor will arrive About a week before the ck oil light came on maybe a month prior to that when sitting at a stoplight, the motor started to shake

I was going about 53 mph and went to pass another vehicle. While in the oncoming traffic lane, the transmission went out. The engine revved up and the gas pedal did not work. The vehicle has been inspected and was found to have a faulty control module that possibly caused the failure within the transmission. The parts are all on "indefinite backorder" and I have a $50,000 loan on a $60,000 vehicle that is now a paper weight.