2023 GMC Sierra 1500 Problems, complaints & recalls

At ~33k miles, the truck started having issues with a hard vehicle shudder at highway speeds (30-60 mph). The issue felt like it was in the transmission and was slamming between gears Here's the history so far: Visit 1 - Dealer replaced the valve body (gen 3 revision). Issue returned worse within a day. Visit 2 - Dealer couldn't duplicate the concern on a short test drive, found no codes, opened a GM TAC case. No repairs made. Visit 3 - Dealer found the C1 clutch had scorched/failed, along with a failed stator...

Engine failure Special Coverage N252494003 Engineering Analysis (EA26005) catastrophic loss of power

own a 2023 GMC Sierra AT4 equipped with the 3.0L Duramax diesel engine and 10-speed automatic transmission. Within the past seven days, my truck has experienced two extremely dangerous incidents while traveling approximately 70-80 mph. Without warning or driver braking input, the vehicle suddenly experienced severe braking or wheel lockup, causing the tires to skid approximately 10-15 feet before releasing and allowing the truck to continue driving normally. Cruise control was not engaged during the most recent...

While driving down the interstate at 75 mph in the middle of traffic with no warning or warning lights, the truck shuddered and suddenly dropped power to 20-30 mph. We avoided being struck and were able to make it to the side of the road without crashing. It would not even idle thereafter so I had it towed. There were ZERO warning lights or error codes that displayed before or after!! According to my mechanic, the timing chain stretched/broke in my 3.0L diesel with NO WARNING whatsoever, and has caused a catastrophic engine failure. Now I'm having to replace the engine in a 3 year old truck with only highway miles and no towing stress on the engine.

The contact owns a 2023 GMC Sierra 1500. The contact stated that while performing an oil change at the residence, the contact became aware that the transmission cooling system was inoperable and that the transmission cooler lines were leaking. The vehicle was taken to the dealer, where it was diagnosed and determined that the cooler bypass valve and seal had failed and needed to be replaced. The vehicle was not repaired. The contact stated that the vehicle was scheduled to be repaired at a service center. The failure mileage was approximately 79,000.

The bezel that attaches to the top of the grill flew off while I drove down the interstate. It went over my truck and almost hit the car behind me and in the lane next to me. The mounting points failed and most of them as still connected to the grill. The grill has some broken plastic mounting and several cracks in the grill around the connection points. I took the truck to the GMC dealership and they looked at it then told me to contact GMC. I have dashcam video (front and rear) of the part detaching and traveling back into traffic behind me.

My vehicle has now been at the dealer two times for issues with the engine. The first time they said my lifters needed to be replaced. They rebuilt the engine to replace the lifters and other engine parts. I picked the truck up and two days later I was driving home and the engine quit on me and I had to pull to the side of the road. I tried to restart the vehicle several times and then it started up, but only for one more mile and it completely went out again and would not restart. It had to be towed to...

Information related to GMC 25V274 recall for 2023 GMC Sierra 1500 6.2L. Recall oil change inspection and change of oil to higher viscosity performed summer of 2025 (prior to my ownership). On May 17, 2026 the Truck lost engine power without warning and would not start again. Fortunately I was on a road and location where I could coast into a parking lot, but again the vehicle provided no advanced warning of any issue. Towed truck to dealership and determined that exact engine problem noted in recall had indeed occurred to engine. So GMC recall efforts to inspect and change oil had NO effect on the engine defect. Engine was replaced.

Grill/exterior parts flying off

For the second time within a year , I am having power steering failure. I replaced the power steering motor and eps module and it is giving me issues with turning. At start up it gives me a warning light saying service power steering and power steering assist reduced.

The shifter shorted out. This gave me one message, Service transmission right away. I drove 10miles home & scheduled service right away. The next day I started truck up and it said unable to shift soon. This is a wide known problem with the GMC Sierra. How many people have to sit on the side of the road with this known defect.

Grill trim popped off on Interstate. Cracked my window and almost caused several cars to crash.

Recall: The GM 6.2L V8 (L87) Engine Safety Recall (Recall No. 25V274000) May/June 2025 Purchased Vehicle:[[redacted]] Recall "Fixed": [[redacted]] passed the Pico test @ Findlay GMC, Prescott, AZ Oil Consumption: [[redacted]] - Used 3 qts oil over 7k miles Was informed by Dealer that the accepted rate of oil consumption was 1 qt per 2k miles Engine Failure: [[redacted]] - Catastrophic Engine Failure (Low Engine Oil Pressure) resulting in total lack of propulsion and shutting down of...

The contact owns a 2023 GMC Sierra 1500. While driving 70 MPH, the upper grille deflector detached and flew over the top of the vehicle. The vehicle was taken to the dealer, who determined that the upper grille deflector needed to be replaced. The contact associated the failure with NHTSA Action Number: RQ26003 (Structure). The manufacturer was notified of the failure by phone and advised the contact to report the failure to the NHTSA Hotline. The failure mileage was approximately 85,000.

the styrofoam part on the side rest area, is broken .. When cleaning and setting back together, shouldn't be a problem. Wish it was a different material, since my baby needs to be protected from that. Also putting it in the car, we all touch that part and it's not so sturdy. When we hit the brake, we held it for extra security and noticed it broke when we got home, and i unassmebled it to check.

My 6.2 motor in my 2023 GMC AT4 truck has blown up. As part of the recall that GM has on this motor it passed the "pico test" at around 50k miles or so ( I can provide the paperwork) and then this past week with 63k miles or so the engine developed a miss and eventually by the time I got it to the dealer there was a significant "engine knock". The service center called the next day and said there was definitely a engine failure and I was lucky to have made it to the dealer. The vehicle is at the dealer waiting on a new engine. I was quoted 2 weeks but we are passing that time frame now. GM needs to be held accountable for this mess.

On [[redacted]], at around [[redacted]] my 2023 GMC Sierra 1500 Elevation suddenly lost power while I was driving eastbound on [[redacted]]. The battery was still running, but the engine lost power and the accelerator did not respond and the truck would not move. I was stranded in the roadway. OnStar emailed me about a critical vehicle issue and reported DTC P129F. Because the truck was stopped in a live lane of traffic, I called 911. Responders blocked part of the road to protect me and to give the tow truck room...

My truck's engine failed in April 2026 and was replaced. Approximately 7,000 miles later, the replacement engine failed as well. After bringing the vehicle to the dealership for another engine replacement, the newly installed engine seized during the dealer's test drive before the repair could even be completed. As a result, I am facing additional delays and have been without a reliable vehicle for an extended period.

I a filing a safety complaint regarding my 2023 GMC Sierra1500. While, driving, the front hood shield/trim piece unexpectedly detached from my truck and flew off into traffic. This occurred on a freeway and could have caused a serious Collison. This is a hazard that this could detach without warning. I believe it is defective. Other models have had a recall on this part and I believe this model should as well

The upper front grille flew off and hit my windshield.

Upon 1st start-up collision warning system light comes on and system is disabled. I shut the truck off immediately and restart it and the collision light goes off and the system functions like normal until the next shut off and restart.

On [redacted], at approximately 2:30am, about 30 hours after purchase, a 2023 GMC Sierra Denali Ultimate suffered catastrophic engine failure in [[redacted]] during a planned 20 hour trip. The vehicle had about 49,007 miles at purchase and 49,411 miles at the time of failure. The check engine light appeared during the trip. Over five hours into the journey, shortly after passing through a one-lane construction zone with no shoulder, the truck made noises, then lost driving power and began slowing among highway...

The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving at 70 MPH, the attachments used to hold the front grille deflectors in place fractured and the front grille detached. The contact associated the failure with NHTSA Campaign: 25V060000 (Structure); however, the VIN was not included in the recall. The dealer was contacted. The manufacturer was contacted by phone and made aware of the failure. The manufacturer stated that the repair was not covered because the VIN was not included in the recall. The contact was referred to the NHTSA Hotline to report the issue. The failure mileage was approximately 69,450.

Upper grille deflector broke off without impact at highway speed.

The contact owns a 2023 Chevrolet Silverado 1500. The contact stated that while driving at approximately 74 MPH, the front grille deflector suddenly detached from the vehicle and struck a second vehicle. The cause of the failure was not determined. The manufacturer and local dealer were notified of the failure. The contact was informed that the VIN was not included in the NHTSA Campaign Number: 25V060000 (STRUCTURE). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 48,000.