2023 GMC Sierra 1500 driver assistance problems

Filed Oct 27, 2026 · Driver assistance · FL

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.

Filed Oct 21, 2026 · Driver assistance · 60,000 miles · MT

The contact owns a 2023 GMC Sierra 1500. The contact stated that while the vehicle was in reverse(R), the rear-view camera froze and occasionally glitched. The failure was a recurring failure. The contact associated the failure with Technical Service Bulletin: PIT6369B. The dealer was contacted. The manufacturer was contacted and made aware of the failure. The failure mileage was approximately 60,000.

Filed Sep 14, 2026 · Driver assistance, Electrical · TX

The front grille trim moulding failed and flew off on the highway. Also, the forward collision light on vehicle from the front camera not working and needing to be replaced.

Filed Sep 10, 2026 · Driver assistance, Electrical · OH

This vehicle has water intrusion for the power steering harness. The system went out one day. Vehicle has 40K miles on it. i bought it less than a year ago as a used vehicle with 30K miles on it. Less than a year later i end up with a $6,500 bill for it.

Filed Apr 18, 2026 · Driver assistance, Electrical · TX

I brought this truck brand new. Had issues the first couple days of purchase that was a quick fix, but as time went on things got worse. Truck always stalling out, engine has been replaced once already due to a recall and months after the first replacement, it stalled out on me again in the middle of the freeway and I just got a call from the dealership that it needs another new engine! How is this right! How is this safe! I could've lost my life on every occasion it has happened.

Filed Apr 10, 2026 · Driver assistance · 37,188 miles · MT

The contact owns a 2023 GMC Sierra 1500. The contact stated while reversing, the rear-view camera displayed a black image, and a message advising that the rearview camera was unavailable, was displayed. The contact stated that upon depressing the brake pedal, the rear-view camera screen reset independently. The vehicle was taken to the dealer; however, the failure was not diagnosed. The contact stated that the dealer inspected the wiring harness and the rearview camera display but found no failure. The manufacturer was made aware of the failure, and a case was filed. The contact stated that an engineer was assigned to inspect the vehicle. The engineer performed an inspection; however, the cause of the failure was not determined. The vehicle was not diagnosed or repaired. The failure mileage was approximately 37,188.

Filed Apr 5, 2026 · Driver assistance, Transmission · WI

On March 13, 2026 I purchased a 2023 GMC Sierra AT4 Pickup with 3.0 Diesel Engine. While driving on a state highway in a 35 mph zone I started to accelerate as the speed zone changed. The truck suddenly had the rear wheel lock up for a brief time about quarter to half second then the truck proceeded on. This happened as the transmission was downshifting. Then on or about March 24, 2026 I was using the same truck and towing a 4,000 pound enclosed trailer. This trailer was hooked up within all recommended hookup requirements. In a 225 mile trip I experienced the same rear wheel lock up happen 4 random times during the trip. Once this happened at 65 miles and hour had there been snow or ice on the highway the truck may have crashed. This lock up happened while using the truck in tow haul mode. Two times it happened while the truck was being towed with cruise control active and two times it happened while not using cruise control. Truck was brought to Authorized GM Dealer and inspected and truck had no stored codes from transmission related issues. Dealer blamed this for using cruise while towing. I informed dealer this happened while not using cruise as well. Was told to turn off adaptive cruise when towing. I was unable to find anything in the GMC Manual regarding not using cruise while towing. This appears to be an issue with the valve body in the transmission and customer explained this to the dealer but they denied this claim. When these quick moment lockups happen no codes or engine lights show everything on dash appears normal. Customer is bringing truck to another GM Dealer to be tested and examined.

Filed Mar 17, 2026 · Driver assistance, Engine · MA

My 2023 GMC Sierra has 60,571 miles for a while now while driving the transmission slips and slams into gears. Recently driving with my kids in the car on highway going 70mph the back brakes locked up multiple times, so scary and dangerous while driving. I now currently have a code P-0747 in the system.

Filed Mar 10, 2026 · Brakes, Driver assistance · SC

This complaint involves a sudden failure of my vehicle’s Anti-Lock Braking System (ABS) and Forward Collision Warning system, both of which are critical safety systems. While driving my [XXX] son to school, multiple warning lights suddenly appeared on the dashboard without any prior indication of a problem. The vehicle displayed a warning message instructing me not to exceed 36 miles per hour, and several system alerts activated simultaneously, my ABS brake system failed and a transmission failure warning. These issues appeared suddenly while the vehicle was in normal operation. Prior to this incident, the vehicle had been functioning perfectly. The evening before, I had driven the vehicle to pick up my son from wrestling practice with no issues. The following morning, during a routine trip to school, these critical safety warnings appeared without warning. Because the warnings involved the braking system, I immediately took the vehicle to Beach Buick GMC for inspection. The dealership diagnosed the issue as a software failure affecting the braking system and informed me that the vehicle required a software update and system download in order to restore proper operation of the brakes and related safety systems. I was required to pay over $300 for this repair because my vehicle is approximately 3,000 miles outside of the warranty period. However, I believe a failure involving the braking system and safety warnings should not occur suddenly in a properly functioning vehicle and should not be treated as a normal maintenance expense. I contacted **General Motors customer service to ask why a failure involving a critical safety system would not be covered or investigated further. The only explanation provided was that the vehicle was outside of the warranty period. I requested a written explanation of their decision for my records, but I was told that providing written explanations is against company policy. I have more to say but I am out of characters... INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMA

Filed Feb 18, 2026 · Driver assistance · PA

Onstar module stopped working