2023 GMC Acadia

TELEMATIC CONTROL MODULE WENT OUT. ON RESEARCH, IT IS A COMMON PROBLEM AND THERE IS NO FIX BECAUSE THE MODULE IS BACK ORDERED. NO TIME GIVEN FOR WHEN AVAILABLE. WE WOULD LIKE TO ADD OUR NAME TO SEE IF IT CAN BE INCLUDED IN A RECALL. [XXX] [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My 2023 GMC Acadia experienced a complete electrical system failure while driving on an interstate highway. During the incident, the vehicle lost all electrical power, including hazard lights and steering assistance, and could not be shifted into neutral. The vehicle became immobile in active traffic and required police-ordered towing due to safety risk. This incident was the second alternator failure within six months. The second failure involved a GM-installed replacement alternator that failed prematurely. Both incidents required towing, and the second created a significant roadway safety hazard.

On 11/26/24 my wife was running errands in her vehicle when the power shut off and killed the car. She was in the left lane of a busy state highway. She was able to coast off the road slightly before the vehicle came to a complete stop. The dashboard said to press brake and start button, but the car would not start. The vehicle was also stuck in drive and would not switch to park, neutral, or any other gears. Police came and had to push her vehicle with theirs into a nearby park lot so a tow truck could pick it up. It is currently at a GM dealership waiting to be looked at.

The contact owns a 2023 GMC Acadia. The contact stated that on several occasions while driving at various speeds, the vehicle began jerking with the "Service Stabili-trak" message displayed. The vehicle was taken to a dealer but was not diagnosed; however, the dealer tightened the battery terminal. The contact stated that the failure persisted. The manufacturer was notified of the failure. The failure mileage was 31,000.

The contact owns a 2023 GMC Acadia. The contact stated that after his wife had driven the vehicle approximately 75-80 MPH on the highway, and was attempting to turn into the driveway, the vehicle inadvertently shut off. A message indicating a transmission failure and other unknown warning lights were illuminated. The vehicle failed to restart after several attempts. The vehicle was towed to the dealer however, the cause of the failure could not be duplicated. The contact stated that the vehicle had been at the dealer for four months. The manufacturer was notified of the failure, but no assistance was provided. The vehicle was not diagnosed or repaired. The failure mileage was approximately 6,250.

The contact’s daughter owned a 2023 GMC Acadia. The contact stated the seats were previously repaired at the local dealer. The contact stated that while the vehicle was parked unattended, the vehicle caught fire. The fire had extinguished on its own. There were no reported injuries, air bag deployment or police reports filed. The contact called the local dealer who referred her to the insurance company. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The insurance company informed her the failure was due to the electrical system and deemed it a total loss. The VIN was not available. The failure mileage was approximately 13,000.

The contact owns a 2023 GMC Acadia. The contact stated upon driving from a complete stop, the vehicle stalled inadvertently. The vehicle then accelerated independently. The contact depressed the brake pedal, but the vehicle hesitated to respond. The contact was able to regain control of the vehicle and drove to her nearby workplace. The check engine warning light was illuminated. The contact stated that dealer personnel then drove the vehicle to their location for diagnostic tests. The dealer diagnosed that the solenoid switch needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 6,514.

Purchased Vehicle Oct.21 2022. In first week, vehicle left my wife stranded twice, and myself once. When error occurs, vehicle goes into limp home mode and cluster illuminates all lights, says serivce brakes, transmission, engine, fuel tank reads "E" (when is was just full), PRNDL buttons are flashing and will not allow park, does not respond to throttle inputs... only way to be not stranded as the vehicle will not restart is to disconnect battery or wait 15-20 minutes as the vehicle seems to incorrectly "heal" its errors and allow the engine to restart. I noticed this when the tow truck came to pick it up, and he "drove" it on to the flat bed. 45 Diagnostics showed up on the scan tool, all relating to CAN bus communication. My concerns are the following: 1. How can a 2023 vehicle with <400 miles leave some one stranded 3 times because of a CAN bus comm error? There is an electrical gremlin (likely from lack of quality control) causing to leave a customer to having to limp to the side of the highway. 2. Why is the error able to incorrectly "Heal" itself, ie. the fault reactions seem to debounce and allow engine to restart (as mentioned prior) after a certain amount of time. This only leads to potentially putting the customer back at risk as they just were. 3. GM dealer is yet to start troubleshooting, its been 2.5 weeks. Claim is that they "need a transmission guy to look at it since the codes causing the check engine light are transmission module". Although, the vehicle has approximately 45 active codes, relating to many different modules and all pointing to CAN bus error. The vehicle has an electrical issue, causing my wife to get stranded. first warning on cluster before being stranded : "Service: Transmission Now Unable to shift Soon. " What does this even mean???? this does not tell me, what the problem is, and what I should do about it. I am an experienced OBD Engineer from an auto OEM and this does not follow best practices. Please help.