2023 GMC SIERRA 1500 Complaints

While driving vehicle I received a message on the dashboard, "Reduced acceleration, drive with caution" and then the check engine light came on. Took the vehicle to local Autozone to get code read and was told "P1028" was the error code. Schedule an appointment with local GMC dealership for diagnosis. After three days dealership told me that the technician has diagnosed my truck with faulty "Engine Coolant Control Valve". I was told the part is backordered with no ETA. Asked for a loaner vehicle while truck is waiting repair and was told there was nothing available. When asked about what I should do transportation, dealership told me I could come pick up the truck and drive it until part arrived but I would need to watch for further engine issues as the engine could overheat. How do you tell a customer to just continue driving a vehicle with a known issue. Additional fear is what if additional harm is caused and because I drove the vehicle with a known issue they won't cover the cost of repair? This all seems fishy and unfair as a consumer.

The contact owns a 2023 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.

The coolant control valve needs to be replaced. My estimated time to get the truck back is 1-2months. This appears to be a common problem. And its not covered under warranty

Transmission Valve Body physical failure causing jerking and abruptly reducing speed to 30 MPH. Vehicle is available for inspection Safety of driver and passengers included abrupt deceleration changes risking physical injury to persons and sudden loss of control of vehicular speed/acceleration risking accident/collision with or by other vehicles. Vehicle has been inspected by dealership and is awaiting new part for 100+ days Warning indicator for service check illuminated but then reset and turned off without incident. Issue with driving occurred with second incidence of service check warning, and vehicle was taken in for inspection/service.

The contact owns a 2023 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The local dealer was contacted and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

On June 1 my 2023 gmc sierra 1500 6.2 began making a grinding and knocking sound on the engine no previous warning or symptoms. I believe it's a problem related to the engine recall so on June 2nd I took my vehicle to the dealership Brown Chevrolet of Eagle Pass TX where I was told that it would be about two weeks for them to get to it.

My GMC was listed under a recall that came out in 4-24-25. This issue can cause loss of propulsion to my vehicle and can cause serious risk of injury or an accident if the issue does occur. I tried to call my local dealer in Auburn WA to address the recall and was told there is no fix as of yet. Because of how serious this issue can be I’m shocked GMC is dragging their feet on a fix. I think this needs to be looked into and expedited to avoid injury.

I was driving and without warning the engine stopped. Luckily I was on a neighborhood street and was just left in the middle of the road without incident. However, if I was turning on a left into traffic or on a major highway I would hate to think what would of happened. Again, this motor gave zero indication it was going to fail. It did not knock etc. Truck is currently at the dealer waiting for a new engine. This recall will lead to fatalities if others fail in this manner.

The active cruise control does not appear to be able to be completely turned off, you can only cancel a particular speed you have set. I have experienced multiple times in a parking lot situation when trying to park that as steering wheel was spinning, it is very easy to hit the toggle switch that sets/resumes the cruise control, at that point vehicle may acclerate to the set point as you are trying to park. You must quickly either hit the cancel button or the brake to disengage the cruise control that you have no intention of engaging. Although I have been able to get the situation under control, had another moving car or pedestrian been close by, not sure if I would have same result. I have gone through the operating manual provided with the vehicle, and from what I can tell, there is nothing in the manual that even tells you how to operate the active cruise control. It seems like there needs a “system off switch” so the set/resume button is not active, until the system is turned on. I have owned many GMC Products, and none have had the design where the toggle switch sticks out from the steering wheel and is easily inadvertently engaged. Usually the controls are flat/smooth like the “cancel” button on this vehicle…….which can’t easily be engaged accidentally. Luckly, I have not had a crash or injured a pedestrian

The contact owns a 2023 GMC Sierra 1500. The contact stated while driving 35-50 MPH, the message "Service Engine Soon" was displayed. Additionally, the power train warning light was illuminated. The vehicle was towed to the dealer, where it was diagnosed that the gear shift control module had failed and needed to be replaced; however, the part was not available. The vehicle was then towed to Parkway Chevrolet (25500 TX-249, Tomball, TX 77375; where the gear shift control module was replaced. Additionally, the contact stated while driving 35-40 MPH, the vehicle was sputtering. The contact was unaware of a warning light being illuminated. The vehicle was taken to the dealer, where it was diagnosed and determined that the TCM needed to be updated, and an unknown part needed to be installed for transmission cleaning. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the dealer for assistance. The failure mileage was approximately 21,000.