GMC Complaints

My 2022 GMC Yukon with the 6.2L V8 engine is covered under recall 25V274000 for connecting rod and crankshaft defects that can cause engine failure. Approximately three months ago, Wiesner GMC dealership performed the recall inspection and stated the vehicle passed. Recently, the engine suddenly began misfiring on cylinder 6. The failure was sudden and severe—the vehicle started shaking significantly, the check engine light illuminated, and multiple safety sensors began deactivating. The vehicle was clearly unsafe to drive. An independent repair shop diagnosed oil leaking into the cylinder and stated the condition is consistent with internal engine component failure—the same type of defect the recall is meant to address. When I contacted the dealership to have it re-evaluated, they stated my vehicle is no longer under standard warranty and I would be responsible for repairs. After escalating to GM customer service, they confirmed extended coverage exists under Special Coverage N252494003 (10 years/150,000 miles) if the diagnostic confirms the issue is related to the recall defect. The fact that my vehicle passed the recall inspection three months ago and is now exhibiting the exact failure symptoms the recall was designed to prevent raises concerns that the inspection procedure may not be detecting all affected engines. The component (engine) is available for inspection. This defect poses a serious safety risk as the sudden loss of power and deactivation of safety systems could cause a crash.

This concerns a 2020 GMC Yukon XL Denali motor (6.2L gas) 118,000 miles. Regular maintenance performed every 5 K miles and per request of original dealer. Beginning 2 weeks ago a new regular pinging developed and the vehicle was taken to the dealer (at which time new tires were installed routinely). No clear issues were found upon brief inspection/auscultation and advised to return if the sound was recurrent. The sound persisted on a fairly frequent though intermittent basis. A recording was made and another appt made for routine spark plug replacement. Upon return and repeat inspection it was discovered that oil filter was full of metal shavings and advised it was very likely necessary for a complete engine overhaul (with $18-20 K price tag). Checking online it was discovered that this GM motor had a 580,000 vehicle recall for 2021-2024 models. A new ODI study is being done for similar complaints for 2019-2021 year models (additional 280,000 vehicles). The 6.2L motors have been found to have a crankshaft/bearing issue leading to motor failure and even sudden loss of power often presenting with metal particulate matter being discovered. Awaiting resolution.

Reduced engine power warning light came on at approximately 7600 miles on our new 2025 Yukon xl. Dealer inspected and ultimately decided the engine needs to be replaced due to crankshaft end play out of spec. This is a know GM issue. Incorrect thrust bearing was installed from the factory. Gm did not inform us of this issue. This could have resulted in catastrophic engine failure and cause to be stranded on the road. Not ideal when it is -20 degrees in my hometown. Dealer finally replaced engine then had lane departure unavailable and lane assist unavailable warning lights. Dealer claimed this was unrelated but all safety equipment worked when we dropped it off. Now it doesn’t.

MY 2020 5.3 L GMC AT4 IS EXPERIENCING LOSS OF POWER WITH BUCKING & STALLING. CYLINDERS ARE NOT ACTIVATING WHEN CALLED CHECK ENGINE LIGHT IS FLASHING, IT STARTS ROUGH AND MAKES NUMEROUS NOISES AT VARIOUS SPEEDS, AS WELL AS AT IDLE. SO I BROUGHT MY VEHICLE TO MY LOCAL AUTO REPAIR SHOP. OUR MECHANIC FOUND TWO FAILED FUEL INJECTORS AND A FAILED THROTTLE BODY. THEN THE LOUD KNOCKS IN MY BLOCK FAILED AN ACOUSTIC TEST. HE ALSO DETERMINED THE LIFTERS, PUSH RODS AND CAMSHAFT ARE EXPERIENCING EXCESSIVE WEAR. THE AFM SYSTEM HAS FAILED! HE WARNED ME THAT FURTHER USE OF MY MOTOR (WITH ONLY 42K MILES ON IT) WILL CAUSE A CATASTROPHIC FAILURE. MY RESEARCH SHOWS THAT THESE ISSUES ARE BECOMING COMMON OF 5.3 GMC MOTORS. WE SEARCHED THE COUNTRY FOR A REBUILT MOTOR AND FOUND THAT NONE ARE AVAILABLE FOR THE NEXT SEVERAL MONTHS. HOWEVER, I WAS ABLE TO FIND A NEW MOTOR AT MUCH GREATER COST. GMC HAS DECLINED ASSISTANCE AT THIS TIME. MY VEHICLE HAS NO VALUE AS IS, SO I ORDERED THE NEW GM ENGINE. WITHOUT THE DOD SYSTEM, THESE ENGINES WERE DESIGNED TO GO WELL OVER 100,000 MILES. I AM A FAITHFUL GMC OWNER AND NONE OF MY PREVIOUS GMC TRUCKS (2003, 2013, 2015, 2019) HAD SUCH A MAJOR PROBLEM. NOW THE 2020'S FUEL SAVING SYSTEM HAS FAILED AND REQUIRES REPAIRS THAT AMOUNT TO HALF THE VALUE OF MY TRUCK. WHEN A FULL SIZE TRUCK STALLS ON THE HIGHWAY IT'S CERTAINLY LIFE THREATENING.

THE fuel pressure line from the fuel pump to the flex fuel sensor chaffed a pin hole leak near the front top of the fuel tank. This caused a significant fuel smell and trace leak at the front of the fuel tank which could lead to a fire or explosion. The new hose has a longer chaffing covering leading me to believe gm knew about this issue. vehicle has 127,000 miles. I feel gm should reimburse me for this repair as a fuel line should not have ever chaffed through and leaked.

Heard a ticking noise then check engine light started blinking along with service esc and parking brake. Took it to the dealer and I had a bad lifter again. I was previously repair for lifters under warranty a little over 2 years ago.

On July 3, 2025 we were traveling on a 4 lane at 55mph. Without any prior symptoms, the vehicle began to shake violently. It shook so hard that the skid warning light simultaneously came on. It was followed by the check engine light. The oil pressure guage started bouncing around. We stopped driving the vehicle and had it towed to VanYork GMC dealer in Asheboro, NC on this same day. (Invoice attached) VanYork GMC determined that cyclinder 5 was misfiring. We paid to have them repair it, and we began driving the vehicle again. (invoice attached) On or about August 1, 2025 we were traveling on an interstate at 70mph. Without any forewarning, the vehicle began to violently shake. Just as before, the skid warning light simultaneously came on, followed by the check engine light came on, and then the oil pressure guage started bouncing around. As there was heavy traffic on the interstate, the failure created a very dangerous situation for us as we tried to maintain our lane, and stay in control of the vehicle until which time we were able to safely maneuver to the side of the road. The vehicle was again towed to Vann York GMC in Asheboro, NC. (invoice attached) On December 3, 2025 we received a call from VannYork GMC saying that the vehicle repairs were complete. It had been in their repair shop for 4 months. This repair began with lifter and camshaft replacement. When this repair was unsuccessful, they decided that the vehicle needed a 'new' rebuilt engine. Since GMC has not offered any assistance with the expense of this new re-built engine, we will have to satisfy the $12,000 bill when we pick it up. After experiencing two very dangerous episodes, we are happy that we did not wreck, but certainly, this not the situation we expected from a high-end vehicle with only 76,169 miles on it.

The contact owns a 2024 GMC Sierra 1500. The contact stated that while driving 40 MPH and attempting to make a right turn while depressing the accelerator pedal, the contact heard a popping sound coming from the front driver’s side and three of the wheels attempted to switch to 4WD; however, the driver’s side wheel failed to respond as intended. The contact was able to pull over to the right side of the road. A dealer was contacted. The vehicle was taken to the dealer to be diagnosed; however, the result was not provided. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 25V274000 (ENGINE and ENGINE COOLING); however, the VIN was not included in the recall. The manufacturer was not notified of the failure. The failure mileage was 55,000.

On 10/21/2025 as I was traveling on the highway in Kansas at 60 mph, the vehicle lost power and the engine went into limp mode immediately reducing the speed dramatically. Multiple warning lights flashed on the screen. I was able to get the truck to the side of the highway. The vehicle never started again. I was informed by the dealer that the vehicle would need a new engine.

The car is in park & ignition button has been hit to turn vehicle off. When engine is turned off all interior, exterior, dash, & ignition switch lights remain on with a notification on the dashboard stating to "shift to park". The doors can not be locked when this message is on the screen. It can take anywhere from 30 seconds to 15 minutes for the lights & dash to go out, allowing you to exit & lock the car. If you exit the car while the message still appears on the dash, not only are the lights on & unable to lock the car, but if someone where to get into the car, without the key fob, they can start the car & drive off. My husband & I were in a shopping center parking lot in July 2025 where the "shift to park" error came on. We sat in the car, 110 degrees outside, for 10 minutes waiting for the car to shut down. Finally we had to exit the car because we could no longer take the heat. My husband went back to the car, 5 minutes late, while I was in the store to see if the car had finally shut down. To his surprise the lights and dash where still on. He noticed the start button light was also still on & thought if he hit the button the lights would shut off, but no, the car actually started & again he did not have the key fob with him. This is a serious issue & needs to be addressed & I do not feel that I should be paying for this repair. My husband unexpectantly passed away in Sept 2025 & now I am left to deal with this on my own. I have to get this issue fixed as I can not take the chance someone will take my car someday nor do I want to continue to sit in my car for 10-20 minutes waiting for it to shut down. The dealership I took it to diagnosed it as due to a faulty switch in the shifter which means its poor workmanship & not related to owner usage. Please add this to the recall list so that I can get it fixed quickly or if I have to get it fixed prior to being approved by you I can at least recoup my money. Thank you