2022 GMC Sierra 2500

The Exhaust Pressure Differential Sensor Pipe (boost pipe) blew off while towing a heavy trailer uphill on a busy interstate. I had to cross 3 lanes of traffic to get as far as possible off the road. The truck was sent into limp mode and would barely crawl. Our lives were put at risk of being hit by the many tractor trailers traveling that highway, or another driver traveling at high speeds. The truck was eventually towed to the nearest GM dealer for service. The pipe was replaced, but the faulty one was not kept on hand. The repair was not covered by GM. The extended warranty covered the pipe repair only, with out of pocket still being over $400. There were no warning lights on the dash until after the pipe blew off and the truck was thrown into limp mode. This is a known problem with these diesel engines, for years, yet nothing has been done by GM to fix the problem. Owners are replacing with aftermarket parts because the factory parts won't hold up. This damaged the DPF and DEF system as a result. The replacement parts are listed in my owners manual under the 5 year/100000 mile powertrain warranty, yet the claim was denied by GM. There are forum after forum with these failures for the past 15 15 years or more, yet nothing has been done to fix the problem and owners are put at risk of injury or death. When the dealer replaced the part, it was disposed of so no inspection could be made by anyone else to determine if it was defective.

My 2022 GMC Sierra 2500HD was previously repaired under GM safety recall N232426400 / NHTSA recall 24V060 for the power-unlatching tailgate switch, which can fail from water intrusion. The recall repair was completed and the recall now shows as closed. Recently, the same tailgate switch problem occurred again. The dealer diagnosed water intrusion/corrosion affecting the tailgate release switch circuit, including damage to the related wiring harness/connector. GMC customer assistance stated they could not assist because the recall is closed. I am reporting this as a possible failed or inadequate recall remedy. The same water-intrusion condition addressed by the recall appears to have recurred after the recall repair, and the vehicle now requires additional repair to the same tailgate release system. This raises concern that the recalled safety defect was not fully remedied and that other vehicles may experience repeat failures after the recall is marked complete.

The gmc trailering app will not read trailer tire pressure above 100psi. When trailer tires carry a safe psi amount above 100psi the trailering app will not be able to confirm if the trailer tire is low in pressure which could cause a massive wreck if driver did not know the trailer tire was going bad. Truck was taken to dealer, they tried to follow bulletin 22-NA-172 to have the pressure to read above 100psi. But they could not get it to work, I was told it was a trailering app issue and nothing they can do until GM takes the steps to fix the trailering app.

[XXX]: After arriving home and parking in my driveway (plugged in the block heater that came installed from the factory), approximately 35 minutes later my neighbor rang the doorbell. She was yelling that my truck was on fire! The flames were starting to hit my eaves on my house. I put the fire out with my hose. The Sparks Fire Department had to pry open my hood to disconnect the batteries in order to stop the truck from lighting back on fire. The vehicle has been inspected by General Motors and turned over to their insurance. My insurance has also inspected the vehicle and stated they believe that the wiring to the block heater was faulty. There were no warning lamps, messages or other symptoms of the problem. This truck has 19,000 miles and is 1.5 years old (2022). How could this be turned over to GM's insurance and not under warranty? I have not had my truck for over 2 months now. I wonder how many of these trucks are lighting on fire? The truck is currently at the local dealership and is available for inspection. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)