2023 GMC Acadia

The contact owns a 2023 GMC Acadia. The contact received notification of NHTSA Campaign Number: 23V172000 (Power Train) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

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.