In the past 6 years I have owned 4 GMC 6.2L trucks the first was a 2019 no issues great truck. The second unfortunately had a Short life with another vehicle. In 2023 The third a 2021 Denali 6.2L truck at 34k began using oil and blowing blue smoke out the tailpipes. The dealer started an oil consumption test (like you couldn-??t see it happening) so finally at 45k they tore down the engine and found worn out valve guides and scored cylinders. They ordered an engine the engine was installed and it failed in 25 miles come to find out it was not oiling on one bank, A second motor was ordered and installed it failed at start up. At this time it had been months that the truck was down. The dealer took a stand and moved me into a 2022 GMC AT4 with 6.2L with the hopes of removing the issue this truck was the internet sales managers truck that he had recently bought and had 15k on. We made the deal, well at 35k this truck begins consuming oil. The dealer once again starts the oil consumption test process. A couple of months ago. The truck now has 42k or so on it and on my last trip from Atlanta to Fort Walton after the dealer just topped it off 2 1/2 weeks prior to the first 2500 interval of the oil consumption test, the truck burned 1 1/2quarts in less than 2k miles and the oil warning light comes on as we arrive in Fort Walton. I would like a resolution to this, I have invested a lot of money into what should be one of the most reliable trucks on the road and all I hear is GM says it-??s not met their threshold of a problem and you should expect to have to add oil to a truck with less than 45k on it and it-??s not a problem. It-??s already been proven with the 2021 that GM has a problem, I as well as the other 100,000 or so individuals with this same engine and GM knows it-??s a problem with the quality of the engine build. GM has a quality issue and knows it but they are not addressing it, just making the consumer jump through hoops and not finding a fix in 5 yr's is bad

- Dacula, GA, USA

The contact owned a 2022 GMC Sierra. The contact stated that while driving at 45 MPH, the vehicle went into safe engine mode and stopped. The vehicle attempted to restart without application multiple times. There was an abnormal grinding sound detected. The contact pushed the start/stop button, and thirty seconds later, the contact noticed white smoke from the engine, and the vehicle caught fire.? There were no warning lights illuminated. The occupants were able to exit the vehicle. There were no reported injuries, crashes or police reports filed. the air bags deployed due to the fire. The fire department extinguished the fire. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The vehicle was towed to a tow lot. The insurance agent conducted an independent investigation and found that the wire harness in the engine was hot and severed the fuel line. There was fuel in the engine. The insurance company deemed the vehicle a total loss. The manufacturer was contacted, who took possession of the vehicle from the insurance company. The failure mileage was approximately 30,000.

- Chesterfield, MI, USA

On June 8th I started my truck and it made a strange unfamiliar noise before starting. I thought it was bizarre. Shortly after I stopped in traffic and my truck stalled out. It stayed on but when I went to give it gas I didn-??t move. So I restarted the engine and the same strange noise was made. Along with the noise I smelled something funny so I pulled into a gas station. Little did I know my truck was on fire. I got the vehicle away from the gas pumps and within 5 minutes the whole truck was on fire. Before this fire I had brought the vehicle in for service due to a check engine light multiple times the codes will be listed below. I also had an interlock device installed in the truck at the time.

- Wells, ME, USA

Just got off the highway was at stop sign on exit ramp and it just died. No warnings no lights no indication that something was about to happen. No neutral so couldn-??t even push it out of the way of traffic. Had it towed to shop for diagnostic. Possible lifter problem. $600. Dealership towed it to their shop. Engine tear down, lifters replaced. Gmc to pay 30%, dealership paying $1000, me $1300. Dealership started truck and the crank bearing spun. Now needs new engine, which are on back order. Cost "?? How long before engine available??" This is a known problem by the dealerships, GM & repair shops. Had we still been on the highway when this occurred doing 75mph we could have been killed.

- Afton, MI, USA

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, he heard a knock sound coming from the engine compartment. No warning lights were illuminated. The vehicle was taken to the dealer, and during an inspection, the engine seized, after which the dealer diagnosed a failure with the rod bearings. The vehicle was repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 31,000.

- Conway, SC, USA

While unlocked, passenger doors go through unlocking phase, door locks click, parking lights flash and tail gate comes open. Along with this, an electric motor sound comes from underneath the vehicle (pre start fuel pressurization sequence?) that goes on and on, doors locked, or unlocked, that, left unchecked, drains the battery. Must be hooked to battery recharger round the clock.

- Dewittville, NY, USA

The contact owns a 2022 GMC Sierra 1500. The contact stated while driving 70 MPH, the vehicle lost power. There were no warning lights illuminated. The vehicle was towed to the local dealer but was not diagnosed or repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 14,000.

- Columbia, SC, USA

The car consumes oil to the point there's no oil in the engine. Not a result of a leak but rather the engine is actually burning it. I've taken it to 4 dealers, all confirmed it's due to Kia's bad engine design & that there's no visible leak anywhere. The kia dealer also confirmed there is no oil level sensor but only an oil pressure sensor. According to the dealer, I don't qualify for a new engine until the check engine light turns on or the vehicle results in a fire. I have to get the oil topped off every 500 miles. I don't feel safe driving this vehicle. The dealership also states I'm no longer covered under the warranty as I'm a 3rd owner. My coverage ends at 60,000. I was not aware of this during purchase of the vehicle back in 2020.

- Bothell, WA, USA

While driving my Vehicle down Interstate 20 in Odessa TX the engine locked up and quit running at 70 mph in traffic. The truck is 13 months old with 17,000 miles on it. No warning lamps or alarms prior to the truck just shutting down. It was towed to the nearest GM Dealership and the Maintenance facility was able to diagnose that the motor was locked up. It was towed back to the purchase dealership in Shreveport LA at owner expense of $2,500.

- Keithville, LA, USA

While driving my 2022 Sierra elevation in April of 2023 my check engine light and a reduced power light came on and onstar diagnostics gave me a code of P30B2. Made a service appointment and was told there was an issue with the wiring. Problem was fix so i was told by the dealership, but the check engine light has come on 3 more times for the same reason.

- Pasadena, MD, USA

I purchased my 2022 GMC Sierra Denali Truck back in November from Ewing GMC in Plano, TX. I am a roofer, and my career depends on my vehicle. I live in Plano, TX, and was driving 80 mph back from Lubbock, TX around 12 PM Friday 3/24/23, on the highway when a notification appeared on my dash saying I needed to press the "start" button. The truck completely shut off, making it difficult for me to pull to the side of the road safely. Once I had stopped, I put the truck in "park" and it was completely unresponsive and would not re-start. I had to wait over 5 hours for OnStar to get a tow truck and get my truck. It was eventually towed to Frank Brown GMC in Lubbock around 6:30 PM that evening. I live in Plano, TX, and had to fly back the following morning. GMC in Lubbock was not able to look at the truck until late Monday afternoon 3/27/23. The service manager in Lubbock said the engine appears to be seized up internally and they have suggested a complete engine replacement from corporate. It is now Wednesday 3/29/23. I am still without a loaner truck, as Ewing GMC here in Plano will not provide me with a loaner since the truck is not in service at that location. It is not my responsibility to get the defective truck back to GMC Ewing in Plano, as the truck is still under full warranty. GMC corporate, Ewing GMC and Frank Brown GMC are not taking this situation with any urgency, and I am now responsible for paying for an $85,000 truck that does not run and GMC has not been cooperative in resolving the situation in a timely manner. I am at a loss as to what can be done and how I can proceed to get this resolved ASAP.

- Plano, TX, USA

Engine began stubling and warning lighta began flashing.

- Lisle, IL, USA

i FEEL IT IS IN THE FUEL MANAGEMENT SYSTEM When driving along every now and then you can feel a vibration like diving on rumble strips. there is no rhyme or reason for it. I had it to the dealer and they told me that was normal, if you don't want it to do it then drive in 9th gear. I'm not going to shift to 9th every time I drive.

- Forest City, PA, USA

The engine shut off completely at a traffic light and didn-??t start when I pressed the gas pedal to move. It has auto start to save gas and normally starts and stops at lights. This time, the car shut off completely, and I had to completely cycle through starting the car. I almost got rear ended because I took my foot off the brake to drive, and then nothing happened when I pressed the gas.

- Carlsbad, CA, USA

On 05/28/2022 my family was driving my brand new 2022 GMC Sierra 1500 3.0 Diesel at a rate of 60mph. There was suddenly a loud clunk (transmission) after proceeding a little further and getting speed back to 60mph there was a similar -??clunk-??-?? the diesel truck then immediately gained several various check engine / sensor lights all over the dash and went into Limp Mode. Speed slowly decreased from 60mph and finally as we were navigating our final left turn to our destination the truck would not accelerate thru an intersection subjecting our entire family to utter danger of oncoming vehicles. As a last ditch effort to save ourselves I put the truck in reverse and was able to reverse about 2mph. Then proceeded to shut the truck down and turn it back on to get out of the intersection, but the truck would not come out of park. Onstar emergency was contacted to call the police as we were in an extremely dangerous situation. This truck nearly caused our entire family to get in a very bad collision. The truck was stuck in the middle of the intersection for over 2 hours. The police even attempted to help getting the truck out of park, but was unsuccessful. The truck was scanned on site and had various codes including C1555 (x4) U0101 (x2) P25A2 U220F Collision assist light Check engine light Service Traction Control Light Service ESC The truck experienced catastrophic failure at only 319 miles. Day 4 of ownership. This vehicle needs to be investigated if it is failing this early on. There also needs to be a manual release for the parking gear. Truck has no way to be placed in neutral upon failure of the transmission relay.

- Port Saint Lucie, FL, USA

Check engine light came on at 458 miles. Took it in and after an hour they determined it was the ecm. They said it was bad. Now they're on the hunt for one. In the meantime, in a day the truck has started feeling like it's over shifting and then bogging down. 458 miles, really! I'm going to need a loaner for longer than I've had it and still make payments.

- Oneida, NY, USA

Purchased 2022 GMC Sierra on 1/18/2022 with 0 miles on it...On 04/08/2022 the engine started a loud knocking noise...sounded like a piston trying to shoot out of engine..very loud..I was afraid to drive it.. We took it to the dealership and they said they have had a few come back for lifter problems.... Not very happy for my purchase of a brand new truck with 0 miles on it after driving for less than 3 months...

- Strang, OK, USA

service trailer brake system, service esc, steering assist is reduced, brake system failure. almost had an accident because of the brake system failure

- San Antonio, TX, USA