2022 GMC Sierra 3500

• What component or system failed or malfunctioned, and is it available for inspection upon request? The issue appears to be with the gear shifter assembly and/or park position sensor within the power train system. The vehicle fails to detect that it is in “Park,” even when the gear lever is physically in the Park position. Yes, the vehicle and component are available for inspection upon request. ⸻ • How was your safety or the safety of others put at risk? This malfunction prevents the vehicle from shutting off properly and displays a “Shift to Park” message even when parked. This creates a risk of the vehicle rolling away if the parking brake is not engaged and prevents secure shutdown, potentially draining the battery or creating confusion in an emergency. It compromises both driver and public safety. ⸻ • Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, the issue was reproduced and acknowledged by a certified GMC dealership service department. They noted it is a known issue affecting other GM vehicles but stated there is no open recall or warranty extension currently available for my specific model. ⸻ • Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has only been inspected by a GMC-certified dealership. No inspection has been conducted by the manufacturer, police, or insurance representatives at this time. ⸻ • Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Yes, a “Shift to Park” message appears on the dash even when the shifter is correctly placed in the Park position. This message began appearing intermittently and has now become a consistent issue over the past few weeks.

The GM N242454440 “collision Rear Wheel Lock Up from Transmission Valve Failure” was performed. The recall rendered the electrical charging system inoperable. GM engineering has been working on the vehicle for more than one month and recently determined that the recall software does not work properly with all vehicles. My truck is being returned to me without the recall being performed. Accordingly the safety hazard associated with rear wheel lockup has not been addressed and cannot be addressed at this time. Presumably GM will develop software in the future to address the safety condition. Meanwhile the safety hazard remains unaddressed for my vehicle and an unknown number others. Reference Riverview Chevrolet GMC repair order 894074

The contact owns a 2022 GMC Sierra 3500. The contact stated while the vehicle was parked, the trailer plug was connected, and electrical fuses popped. The contact stated that all the fuses were blown. In addition, the contact stated while driving the vehicle, the trailer brakes failed to function as intended. The contact stated that the trailer brakes went off and on. The vehicle was taken to the dealer where it was diagnosed with trailer brake control module failure. The contact was informed that the trailer brake control module needed to be replaced. The vehicle was repaired. The contact referenced an unknown recall; however, the VIN was not included in the recall. Additionally, the contact stated that the failure had previously occurred, and an unknown part was replaced; however, the failure reoccurred. The manufacturer was not made aware of the failure. The failure mileage was approximately 31,308.

VARIOUS WARNING LIGHTS ARE COMING ON SINCVE I PURCHASED THIS VEHICLE, SUCH AS ABS, ENGINE POWER REDUCED, OIL CHANGING SERVICE, SERVICE ENGINE LIGHT, SERVICE TRAILER BRAKE SYSTEM, WHEEL TRACKING, SERVICE ESC, PASSING GEAR CUTS OUT. MY VEHICLE HAS BEEN IN THE SHOP MANY TIMES AND IS IN THE SHOP NOW. I HAVE A DEEP CONCERNED FOR THE SAFETY PERFORMANCE OF THIS VEHICLE FOR MYSELF AND MY FAMILY.

The contact owns a 2022 GMC Sierra 3500 equipped with a 2024 Gatormade 35+5 Trailer. The contact stated that while driving on several occasions, the "Check Trailer Wiring" message was displayed. Additionally, when the brake pedal was depressed however, the trailer did not slow as intended; however, the rear brake lights were illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 40,000.

Encountering trailer brake issue where the brakes on our 5th wheel do not activate via the GMC Trailer Brake control module. Have just had it replaced and still experiencing the same issue where it posts an alert on the screen multiple times and does not activate brakes on trailer. This is a widely known issue with GMC trucks and the trailer brake that has been outstanding for over 3 years now and is a safety issue as there doesn't appear to be a fix from any dealerships or GMC. GMC has not taking adequate accountability for this issue. I'm looking at putting together a class action lawsuit with several other customers having the same issue. We are fed up with the inaction and falsely advertised towing package as we are unable to safely tow anything with their trucks.

While driving the truck began switching between towing, normal, and off-road driving modes. Lights were flickering and various messages were being displayed on the dash cluster screen. After parking truck and shutting it off all of the lights were flickering and I was unable to start the truck. Charging the batteries did nothing nor was I able to jumpstart the truck with another diesel. After repairs for these issues, at some point the odometer reset and while likely not certain it reset to zero. GM has no way of knowing when it reset and how many miles were driven between leaving the dealership and the reset leaving me with a truck set to the best guess mileage. I am being told this was a software bug and having experienced another software bug when I had the recall to enable seat warmers where the keyfobs would not work in any way I have serious concerns about the quality and safety of the software on these trucks.