I am experiencing a recurring P04FB diagnostic trouble code on my 2023 GMC Acadia, related to the crankcase pressure sensor. GM issued Bulletin No. PIP5841C, which attributes the issue to moisture buildup freezing inside the sensor. Their recommended fix is to remove the sensor, blow out any moisture, and reinstall it. However, this is not a permanent solution-?"the code returns within days, suggesting an inherent design flaw in the PCV system. Additionally, the replacement sensor (Part #12718935) is on national backorder, making it impossible to obtain. Many owners across multiple GM models using this engine (such as the Chevrolet Blazer and Cadillac XT4) are experiencing the same problem, yet GM has not provided a real solution. A properly designed PCV system should not allow excessive moisture to accumulate in the sensor. Instead of addressing the root cause, GM-??s bulletin merely delays the issue by temporarily clearing the moisture. This approach does not prevent the problem from recurring, and it does not fix the underlying defect. If the sensor fails or provides inaccurate readings, it can affect emissions and engine performance. The fact that the replacement part is unavailable suggests GM may be restricting access to it, possibly because they know it is defective. This raises concerns that GM is quietly managing a widespread issue rather than issuing a formal recall or warranty extension. I am requesting that the NHTSA investigate this issue, as GM's current approach does not resolve the problem. Owners should not be forced to repeatedly clear moisture from a sensor that is failing due to a design flaw. If GM has internally identified a better solution, it should be made available to affected owners instead of delaying action with ineffective temporary fixes.

- White Lake, MI, USA

Since late 2023/early 2024, I started to notice that my liftgate was open, while the Acadia, a lease with less than 15K miles, was parked in the driveway, off. At first, I thought it was a mistake on our part, that we had accidentally hit the button on the remote to open it or had forgotten it open. As time went on, the incidences continued and I realized it was happening on its own, while the car was off! When the Acadia was at the dealership this fall for a warrant repair (a pump that GM knew was problematic but only has alerts out about for now), I mentioned the liftgate. Thankfully, the problem happened at the dealership too so workers could witness it. It's a major safety issue and a public safety issue. When the pump repair was occurring, I got a text from the dealership that the problem with the liftgate was my fault, that how I clean the inside of the car had affected the mechanics and that I would be on the hook for over $300 in repairs. I had no way to prove otherwise and opted to instead disable the open function using the dial on the driver door set to off and it has not opened. Fast forward to last week and GM has a recall on GMC and other pickups where this kind of issue appears to happening to tailgates and it instantly felt similar. I believe GMC Acadia's have the same faulty wiring and I should not be on the hook for this repair but GM should fix the problem.

- Huntington Woods, MI, USA

Vehicle drove for over 30mins before it detected that there was no remote in the vehicle.

- Dallas, GA, USA

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.

- Cavendish, VT, USA