GMC Complaints

Engine failure while driving on highway due to lifter failure. Vehicle had to be towed home and then to dealer. No signs of failure prior to it happening. No check engine light or messages ever given, even after failure.

The truck had been parked for about 4 hours, after a 250 mile trip. I cranked it and started driving to return home. I heard an intermittent squealing noise while driving. I had driven only about 2 miles when the engine suddenly shut down in heavy traffic on a four lane divided highway. I managed to get the truck into the median and stop. I was left stranded in the middle of the highway. It turns out the the engine bearing went bad and ruined the engine. I will now have to replace the engine at a cost of about $15,000.00. This is a safety concern when the engine suddenly failed and stalled while driving on a four lane divided highway, in heavy traffic.

I am writing to express serious safety concerns regarding our 2023 GMC Yukon XL Denali, which has been in our possession for less than two years and has only 24,000 miles. On multiple occasions, while driving at high speeds on the freeway with our four young children, the vehicle unexpectedly lost power and shifted into neutral without warning. This occurred approximately four times on March 9, 2025, when we contacted OnStar for assistance. Despite their response indicating no alerts on their end, we were advised to reach out again if the issue persisted. Unfortunately, the problem did occur again on March 16th, which prompted us to contact OnStar and have the vehicle towed to the nearest dealership for further evaluation. The service department has since informed us that the motor requires replacement. Upon conducting additional research, it seems this may be a known issue with many vehicles manufactured by GM around the same time. We are deeply concerned by this safety hazard, especially given that the malfunction could have led to a life-threatening accident. While we are grateful that we were fortunate enough to avoid any serious consequences, we believe a solution beyond standard repairs is necessary to restore our confidence in the safety of this vehicle. Our family’s well-being and trust in the reliability of our vehicle are of the utmost importance.

During a cross country road trip on [XXX] we experienced the dreaded 6.2 gm engine failure. As I was driving I lost all power going up a steep grade in the fast lane of a 4 lane interstate. There was no room to pull over to the left side so I had to very quickly cross 4 lanes of traffic without any power. I was able to get the yukon off the interstate as safely as possible. Once I placed the vehicle in park it shut off completely. I tried to restart it several times. Finally got a message on the dash saying engine oil cooler was hot or oil was overheated. Called gmc and got a tow to nearest dealership. I rented a vehicle on my own dime and drove that back to north dakota where we live. We are still in the process of getting some of our expenses reimbursed. I called an Uber to pick my wife and 3 daughters up to get them to a near by hotel. My son snd I stayed with the vehicle on the side of the road till the tow truck arrived. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2018 GMC Sierra 1500. The contact stated that while attempting to accelerate from a stop, the vehicle failed to accelerate while depressing the accelerator pedal. No warning light was illuminated. The vehicle was taken to a local dealer, and the transmission was repaired under warranty. The contact stated that a year after the repair was completed, the failure reoccurred. The vehicle was not repaired after the most recent failure. The manufacturer was made aware of the failure. The failure mileage was approximately 94,600.

ENGINE FAILURE. CAM BEARINGS FAILURE. ENGINE SEIZED UP. SAFETY ISSUE: TRAVELING ON HIGHWAY TOWING A FISHING BOAT. PULLED OFF FOR FUEL. ENGINE COMPLETELY SEIZED UP WHILE AT GAS PUMP. IF IT HAD IT SEIZED UP BEFORE PULLING OFF HIGHWAY FOR GAS, GREAT RISK FOR A CATASTROPHIC CRASH, ESPECIALLY WHEN PULLING A BOAT TRAILER. ALL SYSTEMS INCLUDING STEERING SHUT DOWN. JOHN JONES CHEVROLET DEALERSHIP IN SCOTTSBURG INDIANA RAN DIAGNOSTICS AND CONFIRMED COMPLETE ENGINE FAILURE. FAULTY CAM BEARINGS SEIZED UP. ENGINE IS RUINED AND MUST BE REPLACED. INSPECTION BY JOHN JONES CHEVROLET DEALERSHIP. WE HAD BEEN ON THE HIGHWAY FOR 3.5 HOURS WHEN PULLED OFF FOR GAS. THERE WERE NO WARNING SIGNS. NO CHECK ENGINE LIGHTS, NO LIGHTS AT ALL ON THE DASH. NO UNUSUAL SOUNDS OR SMOKE. NOTHING UNUSUAL BEFORE THE ENGINE SEIZED UP.

stability tracker alerts, then loss of power steering, would happen randomly, sometimes few times in a row, sometime after shutting down vehicle would reset it - other times not. safety issue when: 1) driving on freeway - made steering difficult if/when needing to make sudden turn or lane change 2) 90 degree turns would be difficult 3) sudden loss of steering ability when there is other traffic oncoming. Taken to auto shop - they ran a few checks, but the issue was sporadic, usually does not happen right away, so it was not reproducible on demand. First repair was for inspection and fluids, did not find issue with the Stability Tracker. When the problem resumed again, took the vehicle back to the shop and they researched the issue more and recommended replacing the steering column. The technician said the issue was on a Recall on previous year/model but not the 2016. The issue started about mid-2024. So far as of 3/2025 the issue has not happened since the column replacement on 2/12/2025. Warning would be the Stability Tracker

While entering the highway from a downward slop exit ramp and towing a trailer, my truck shuddered hard and briefly locked up the rear axle. It immediately went into limp mode with a message that driving speed will be reduced. It also wouldn't shift past 5th gear. When the event took place, the OBD2 generated over 20 trouble codes. My local dealer advised I could drive it to them for repair. Upon dropping it off, they now advise it's NOT safe for driving and they have no eta on the parts to repair the issue. It's now been at the dealer for a week with no update. This is a well known issue that GM refuses to repair or provide a reasonable timeframe for repair. There are countless videos such as this one that show what happens when this takes place. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I WAS SOLD AN UNSAFE VEHICLE FOR WORK/COMUTE FAMILY. THE DEALERSHIP MISLEAD ME AND LIED TO ME ABOUT WARRANTY AND EVEN AFTER I PAID $10,0000 CASH I WAS WRONGFULLY DONE BY THIS BUSSINESS BY NO MEANS WAS THE BUSSINESS TRYING TO CONDUCT GOOD BUSSINESS WITH ME AND I ALSO HAVE A DISSABILITY AND A CHILD WITH A DISABILITY. Incident Date: 5/9/2024 Description: I PURCHASED A 2006 GMC SIERRA $10,000 CASH WAS GIVEN AND PAID OFF BUT I WAS SCAMMED BY THE DEALERSHIP. I BOUGHT THIS VEHICLE UNDER THE IMPRESSION THAT I WAS BEING SOLD A GOOD SAFE VEHICLE FOR WORK AND MY FAMILIES NEEDS ARE ALSO A PRIORITY. I NEVER TEST DROVE THE VEHICLE TILL I DROVE HOME AFTER PURCHASING IT. NOT EVEN 4 MINS ON THE ROAD AND I NOTICED THE ABS LIGHT CAME ON THE DASHBOARD WITH THE BRAKE LIGHT AND THE FRONT BRAKES BEGAN TO SMOKE. I CONTACTED THE DEALSHIP BUT WAS DISREGARDED AND NOT OFFERED AN EXCHANGE OR ANY TYPE OF SOLUTION FOR MY PROBLEM I EVEN EXPLAINED MY JOB REQUIRED ME TO USE MY VEHICLE FOR TRANSPORTING MATERIAL FOR WORK AND SINCE I WAS IN CHARGE OF 4 PEOPLE THAT WOUL BE REQUIREING SKILLS FOR CUSTOMER SERVICE AND MAKING SURE ALL CUSTOMERS WERE SATISFIED. PACIFI NORTHWEST MOTORSPORTS TOOK ADVANTAGE OF MY IMPARIMENT I FEELSCAMMED AND I WANT TO HAVE MY MONEY BACK OR AT LEAST EXCHANGE FOR THE VALUE OF $10,000. I WAS NEVER OFFERED ANY TYPE OF SLOUTION FROM THE BUSSINESS THE OWNER LAUGHED AT ME AND SAID THAT IT SUCKED TO BE ME AND HUNG UP THE PHONE ON ME. THE BUSSINNESS OWNER LIED TO THE ATTORNEY GENERALS OFFICE ABOUT OFFEREING ME A REMEDY THE ONLY REMEDY I WOULD CONSIDER IS MY MONEY BACK AND AN EXCHANGE FOR MY TROUBLES I feel that this is a vehicle manufacturer malfuncunctiom. I'm still having the sa,e problem with my brakes .. please help I have tried repairing the problem, numerous times to be unsuccessful .

ODI # 11646185 My truck on [XXX] leaked transmission coolant from the jumper line leak( which this part is recalled but not for my VIN #) $400.61 dollars and left me stranded in the middle of the highway and had to be towed. After the repair and checking the transmission was discovered it was ruined because of the leak. So now I have to have a new transmission installed at Jennings in Beardstown IL to the cost of $7363.39. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)