2021 GMC YUKON Unknown Or Other Problems

The vehicle shifted into Neutral while driving, locked out gear selection, triggered a transmission warning, and now will not restart.

traction control system ESC system Suddenly and without warning, multiple warning lights started flashing including check engine. The vehicle lost power and traction. There was a loud knocking and metallic whining sound. The vehicle began to vibrate and struggled to move forward and felt like the wheels were slipping. The loss of these functions was alarming because it was dark, we were in a construction zone, and my 15-year old daughter was driving having recently earned her driver's permit. The car following us almost rear ended us. It was such an abrupt engine failure it scared me and my daughter.

Premature failure of the telematics module resulting in inability to access emergency services and other safety-related features. Dealer confirmed the components failures are widespread. Check engine light came on as a result as well as inoperable navigation features that rely on the module connectivity.

Multiple people including my family are experiencing leaks in 2021 and newer GMC Yukons and Chevy tahoes. The back seatbelt is causing leaks, damaging the interiors. This can cause mold and health issues as well as electrical wiring issues causing accidents due to shortages occurring. Check Reddit on the number of complaints.

Problems with the engine shifting gears stalling delayed or won’t engage hard shifting while it’s in motion something’s going on with the engine we’ve called several and had it serviced times of times to ask them what was going on with it in Newport Oregon you can fill it still when you drive. The problem still is not fixed. It’s been happening since we purchased it took it in right away. we’ve asked if our Vin number has come up for a recall repairs we are worried for safety and are currently parking in the car because the dealership is unable to fix what is wrong with the car. They’re telling us there is something wrong and are aware of the recall and won’t fix the problem dealership refuses to take the car they don’t want it without the recall fixed due to safety concerns. you can definitely fill it when you drive I’m not exactly sure what the other issue if with the sounds it’s making when the issue keeps happening but it’s scary There is the recall on it. They are not taking into consideration or the seriousness of the situation and the safety of lives.

The GMC is starting to loss power in the engine. GMC has not send me an appointment to inspect the engine. This vehicle is my only transportation to work and doctors appointment. This is not fair for a powerful company like GMC is not taking the ownership of the engine in this vehicle. I need action asap. Please assist. Thank you

The engine and transmission shakes and they say all this normal. Vibration occurs throughout vehicle at idle or driving at any speed. Also, rpm hand slightly moves up and down while idling in park. The vibration is more prominent in 2 and 3 row seats. I have taken it in about 7 or 8 times for the same issue to 4 different dealerships. Only one has actually felt the issue and visually saw the vibration/hop in rear of vehicle. The technician could not determine the problem as GM only allowed a visual inspection. He was not allowed to take anything apart so I am still left with the issue and it is getting worse. In addition, vehicle taken to collision shop to inspect frame, vehicle was within spec. Vehicle is now back at another dealership to address the issue. The only thing that all the dealerships have done is road force balance tires, alignment, and changed out driveshaft axle from a prior recall. I paid to have to have a differential fluid change still has vibration. At this point, it is concerning because as I stated the problem is getting worse. Also, dealers are looking for a computerized answer and I dont think a powertrain issue will be diagnosed this way. My truck should be under recalls but none has applied to it.

On 05.29.25 my 2021 GMC Yukon Denali with 24,000 experienced engine issues and ultimately a total failure. While driving at 65 miles an hour the engine light began blinking and a thumping/knocking noise began on the front passenger side of the vehicle. I was 1 mile away from the GM dealership and went there immediately. They called me two hours later confirming the engine failure and that it would have to be replaced. They stated, however, the engine is experiencing a national backorder. No timeline has been provided for the engine to be received or replaced. I am curious to know if the new engine will come from the same engine group that is currently having issues, and if this can happen again.

Transmission valve body went out, part is back ordered. There is a recall for this part on 2019 to current GM eight speed and 10 speed transmissions. This is clearly one of them. I’m not sure why it’s not recalled?

Engine or something is making a noise every time turned on and now while turning off

Complete failure of infotainment system in cold weather. This is a safety concern because most controls are operated through the infotainment system and can de distracting to a driver who is trying to operate all features of a vehicle while driving. For instance having cold children in the rear seats and not knowing if the heat is activated in the rear of the vehicle and at what temperature or if it is blowing at all. There is no manual indication of rear climate. This is already a safety bulletin for 2021 Yukon that for some reason my vehicle is not included in. GM recall number: N212327470 I want my vehicle included since this is a safety concern ( see above ) and this should be a real recall rather than a notification or safety bulletin.

While driving the car, the glass sunroof spontaneously exploded. It was NOT associated with a rock strike, no other cars were nearby, and the vehicle was not under an overpass. The noise was extremely loud, similar to a gunshot. The sun shade was closed, otherwise broken glass would have showered down on the passengers.

I was driving about 40 mph on a rural road when my vehicle stalled. I thought I was out of gas but I wasn’t. I tried to turn it around but I had no power. I pressed the gas but it would not do anything . It would not crank back up. I called my husband and he came and put gas in it and it still wouldn’t work. I was left stranded in the middle of the road on a curve. No warning lamps were on that I could recall. I’m having it towed to the dealer today. There are 39K miles on the car.

Roof leak on 2021 Yukon w/ moonroof. Happened during an intense ice/rain storm while vehicle was parked on an incline with the front end up and rear end down. Water poured in through all 3 rows, including the headliner, dome lighting, front dash electronic panel on PSG side, and lastly the trunk. Dealer inspected the issue 4 days later, in which they water tested the vehicle with a garden hose indoors in a garage bay when temperatures are above 65 degrees, and on a flat floor. They stated they could not replicate the issue, which of course they couldnt because the dealer does not have the proper testing capabilities to do cold weather testing. They put my vehicle outdoors and allowed snow to fail and melt and it didnt have water come in, which was also above 36 degrees and on a flat parking lot. Dealer was not able to fix the problem and would not replace the headliner, even based on the video evidence I had of the water slooshing in the headliner and pouring out of the dome lights and onto the seats in all 3 rows.

On a road trip out of state we stopped for gas. We got back on the road and few miles out the car suddenly slowed and gave a message on the screen something about acceleration. We pulled over and next the reverse didn’t work. We stayed overnight then next day the reverse still did not work. We were able to place in drive and continue on but we don’t have fully functioning reverse mode.

A/C system draining into drivers side floor area. Water from the A/C system is not draining properly and causing water to collect under the carpet on drivers side, leading to mold, bacteria and potentially harmful to people with respiratory issues. After researching various Internet forums, this seems to be a common issue in 2021 Yukon and Tahoes. The dealership will be investigating the issue tomorrow.