2022 GMC Sierra 2500 problems

Filed Oct 27, 2026 · Transmission · GA

At approximately 84226 miles, the subject 2022 GMC Sierra 2500HD AT4 experienced a transmission cooler line failure. The owner’s preliminary observation is that an adjacent oil line contacted and abraded the transmission cooler line, ultimately producing a through-wall opening. Driver (Owners Son) experienced perceived issues with shifting on his drive home including surging RPM. By the time he arrived home he had concerns about it not shifting gears properly. The next day the owner noticed vehicle fluids on the concrete driveway under the vehicle. Vehicle would not engage in forward or reverse gears. Owner observed a burnt smell in the trucks’ cabin. No check engine light or similar errors were observed. Further inspection showed evidence of fluid on exhaust components.

Filed Oct 21, 2026 · Transmission · GA

Purchased this 2022 GMC AT4 2500HD in 2022. Drove off the lot and traveled 40 miles home. Got hom,000e and pulled out of my driveway and noticed terrible bump in second gear I believe. Notified dealer and returned truck for them to replace 2 valve bodies. One week later the truck experienced terribel bumps in a downshift fashion at slow speeds, like it's downshifting from 3rd to 2nd gear. Returned truck and they replaced transmission. Problem improved some but now with 48,000 miles if your in slow speed downshifting world around 10 mph, it will lock up or hard bump that makes you think you've hit someone in front of you when you're in heavy traffic. It's been doing this at random times since new tranmission was installed. It feels like a lock-up situation. No indicators or messages show up on vehichle. I've made several compaints to dealer with no luck to this point.

Filed Aug 27, 2026 · VA

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.

Filed Jul 6, 2026 · Electrical · 110,000 miles · NY

The contact owns a 2022 GMC Sierra 2500. The contact stated while driving at various speeds and pulling a 10,000 pounds trailer, the vehicle experienced an intermittent loss of trailer brakes. The message "Check Trailer Wiring" and another message pertaining to the trailer brake system were displayed. The vehicle was taken to the dealer, where the Trailer Brake Power Module (TBPM) was replaced; however, the failure persisted. The contact related the failure to GM Customer Satisfaction Program Number: N232414840 (Intermittent Loss of Trailer Brakes). The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance in adding the VIN to the Customer Satisfaction Program. The vehicle was not repaired. The failure mileage was approximately 110,000.

Filed Jun 14, 2026 · Fuel system · OR

Filled tank with diesel and truck wouldn’t turn back on. We were next to a jiffy lube and they were able to run a scan and it said there was a broken fuel module. There’s only around 60,000 miles on it, it’s 4 years old, and left my son and I stranded.

Filed May 5, 2026 · Electrical · MO

My 2022 GMC Sierra 2500HD was previously repaired under GM safety recall N232426400 / the federal safety agency 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.

Filed Apr 15, 2026 · Body · KS

The same thing that happenes to the grill mold in recall N242490120 happened to my vehicle with the hood vent ornament. For reference, the Part number is 84802205/85057002. I was driving on the highway to work and it flew off which caused it to scrape my hood and chip my windshield.

Filed Feb 28, 2026 · Transmission · LA

Was driving down the highway and was approaching a red light. As I was slowing down my transmission down shifted hard and my rear wheels briefly locked up and my truck went in to reduced power Took to dealership only to find out the valve body failed and my truck wasn't covered

Filed Feb 12, 2026 · Engine · PA

The contact owns a 2022 GMC Sierra 2500. The contact stated that the engine was making an abnormal rattling sound on cold starts. There was no warning light illuminated. The vehicle was taken to the dealer, where the front muffler exhaust baffle was replaced; however, the failure persisted. The vehicle was taken back to the dealer, where the contact was informed that the rattling sound could not be heard; however, the contact stated that the rattling sound had become louder, and other individuals were able to hear the rattling sound. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

Filed Dec 15, 2025 · Electrical · 98,325 miles · MI

Odometer Fraud. The contact purchased a 2022 GMC Sierra 2500. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 92,000, and at the time of registration, it was discovered that the mileage was 98,325. The Carfax report was not available at the time of purchase. The mileage discrepancy was later identified through the vehicle manufacturer’s Mobile App.