2023 GMC SIERRA 1500 Complaints

The engine failed with 15,000 miles on it. No warning lights ever came on. Had the oil changed several days prior. Lost power, but was able to drive to the dealer, but making weird noises.

L87 engine locked up while driving dwon the highway. I have been waiting 7 weeks for a replacement engine.

Was driving my 2023 GMC Sierra in a mild snowstorm after leaving the grocery store and heading home. It was about 10 minutes after dark and it has just started snowing. I was only 5 minutes down the road and the visibility in front of me suddenly & drastically declined. I could barely see the road. I could barely make out anywhere to turn out to. Once pulled over, I walked to the front of the truck and the headlights AND fog lights were completely covered in snow. I wiped them off with my hand and could then see great again. Well, 5ish minutes down the road again and they were back to completely covered. Twice I wasn't able to pull over, due to the steep terrain and no shoulder so, I had to push on, traveling at no more than 4MPH. And getting out during one of the 7 cleanings, I almost slipped and fell. It took me 48 minutes to get home. A trip that usually takes 25! The HID headlights on my other truck don't have this problem. And the aftermarket LED headlights on another vehicle of mine have built in heating elements. You would think the OEM would've thought of this option but, they don't offer it! If it wasn't for my 20+ years experience of driving in the snow, I would've been left stranded or wrecked/totalled the truck due to this major safety oversight!

On Wednesday December 4th 2024 at 5:45 am on my drive to work my engine shut down, truck electronically shifted into neutral, and notified me to restart my engine. After I rolled to a stop in a safe area off the main road i tried to restart my engine, with no success. I then called my local dealership to inform them of the issue, and they instructed me to call OnStar and have them setup a tow to their facility. Once the vehicle was delivered it took the dealership 24 hours to determine that the engine had locked up and a replacement was needed. It has now been almost 2 months with no update on my truck or the replacement engine.

While under light acceleration, the vehicle violently down shifts causing the rear wheels to briefly lock up around 45mph. The vehicle traction control activates on dry road way but no check engine light is displayed. The dealership claims the valve body in the transmission is to blame and has a three month back order due to several vehicles with the same failure. The safety issue could be when the rear wheels breifly lock up during wet or slippery conditions and could cause the vehicle to lose control causing a crash.

My check engine light came on so I stopped at a dealership to have it checked out. The dealership in Louisiana said it just needed to be updated. So I made the trip to Laredo, Texas to go to work. The next day the truck went into reduced acceleration and nearly caused me to wreck on the interstate. I had the vehichle towed to the closest GMV dealership. It turns out these vehicles have a faulty engine coolant control valve. The part is on national back order with no ETA. GMC is knowingly allow their customers to operate the trucks with this part that is know to fail. I am currently stranded in South Texas and I will have to purchase a rental vehicle to get back home to Louisiana. GMC will not help me at all with this situation.

I was driving my 2023 GMC Sierra pickup (26,634 miles) while towing a trailer. I also had three of my children with me. I was in the fast lane doing approximately 65 miles per hour when the vehicle suddenly started to lose power. The Low Oil Pressure light came on the engine started to make a banging sound. Then the vehicle said to turn it off. We immediately started working our way across three lanes of very busy traffic to get to the side of the road. We were almost hit by several semi-trucks and barely made it to the side of the road as the engine turned off. We could not get the truck to start again. It also would not go into neutral. We were in a very dangerous position due to semi-trucks going by us at a very high rate of speed. I had to call a friend to come get my children because I was fearful, we were going to be hit. An officer luckily came by and assisted us. The engine was replaced with a remanufactured engine by the dealer. The technician who worked on the truck said that the bearings failed causing the engine to fail.

The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving on two occasions at 60 MPH, the vehicle stalled. The vehicle was restarted after the first failure but was unable to restart after the second failure. The vehicle was taken to a dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 27,750.

During a drive home from dinner, my truck engine completely turned off. I was driving around 25 mph at the time. Car when into neutral and I pulled to the side of the road. Tried to restart the truck, but couldn't not. I had to have the car towed to a dealer. Just got confirmation that my I need a new engine. Then I found that the NHTSA is investigating GMC for this very reason, so I thought I'd file a complaint. * My truck is currently at the dealership, so it is not available for inspection. * While I didn't feel my safety was at risk, If I was driving on a major highway, I may have felt differently. * Yes, problem has been confirmed by a dealership. * Vehicle has not been inspected by anyone other than the dealer. * The check engine light came on at the beginning of the drive, engine failed ~10 min later.

The truck has 12k miles on it and a week ago a bearing rod in the engine failed without warning. An engine should not have significant issues like this after only 12k miles of use. The truck is now with Williams Buick GMC in Charlotte, NC and waiting for a replacement engine.