2019 GMC Sierra 1500 transmission problems

Filed Nov 5, 2026 · Engine, Transmission · AL

1. The engine has failed. Yes it is available upon request. 2. My safety was put at results because the vehicle loss power/pressure as I was driving. 3. Yes the problem has been confirmed by an independent service center. 4.The vehicle has been inspected by an ASE Certified Mechanic. 5. The engine light came on in the vehicle. Carshield Denied Claim, therefore I am responsible for the repairs. I spoke with GMC and it was nothing they could do and advised me to contact the federal safety agency.

Filed Oct 16, 2026 · Transmission · CA

Engine died while on the freeway. Had the truck sent to my dealer via flatbed with AAA. They diagnosed it as the known lifter issue—lifter broke and metal went into the camshaft and scored it. So I need to replace the camshaft and lifters. They’re quoting me $12k for that. I have 83000 miles on this car and I take very good care of it.

Filed Oct 5, 2026 · Engine, Transmission · 120,500 miles · TX

The contact owns a 2019 GMC Sierra 1500. While driving 65 MPH with cruise control activated, the messages "Service ESC", "Service Park Brake", and an unknown message was displayed, causing the cruise control to deactivate. The check engine and transmission warning lights illuminated. The vehicle was jerking and the transmission was lagging while driving. The vehicle was taken to the dealer, who determined that the camshaft and lifter needed to be replaced. The manufacturer was notified of the failure by phone and advised the contact to file a complaint with the federal safety agency Hotline. The failure mileage was approximately 120,500.

Filed Oct 2, 2026 · Transmission · FL

Engine failure. My engine is near failure, loud knocking, check engine light and trusted repair shop analyzed. The repair diagnosis is that the engine will fail in the very near future and that is not safe to drive because of risk of failure. I like the truck and it is still in great condition (129k miles). So, I search for recall information and see the 6.2L 2021-2024 recall and see there is additional investigation underway on newer models. Is it possible it goes back to the redesign of the pick-up in 2019? It sounds like the same issue.

Filed Oct 1, 2026 · Transmission · NC

Truck has GMC 6.2L engine at 66,000 miles, lower end of engine failed. GMC refused to handle complete engine replacement. Final bill was $9858.66, GM covered $1400.00. Local GM dealer truck was purchased from refused to assist in any way. Dealer refused to give detailed diagnostic of what caused engine failure or the repairing tech's repair notes

Filed Sep 8, 2026 · Transmission · IL

I had complained to the dealer less than one year after purchase in may of 2019 that there was a shuddering noise and the transmission hesitates and seems to lock up at times. I was told it was "just how the 8-speed transmission operates". It has contnued throughout ownership and now seems to lose power and vibrates excessively during acceleration.

Filed Aug 31, 2026 · Engine, Transmission · AL

Engine went out very devastating $10k out of pocket

Filed Aug 28, 2026 · Engine, Fuel system · AR

I am the owner of a 2019 GMC Sierra 1500 4WD equipped with the 6.2L L87 V8, VIN [XXX], currently at 177,271 miles. On [ADD DATE] while driving 40-45 mph westbound on [XXX] near XXX in [XXX], in a school zone, the engine suffered sudden catastrophic internal failure with complete loss of propulsion and would not restart. No prior warning lights or low oil pressure warning. Vehicle required tow from school zone. GMC dealer inspected and verified catastrophic internal failure. Dealer stated verbally failure is either camshaft broken in half or timing chain sprocket/pulley broken off or loose causing timing chain to come off. Timing cover was not removed to confirm. Dealer stated engine is not repairable and quoted $13,500 for new engine replacement only. I have copies of the work order and the dealer's written statement verifying internal failure and replacement recommendation. Engine and vehicle have been retained. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 20, 2026 · Transmission · 108,000 miles · TX

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed and the vehicle started jerking and shaking before unintendedly accelerating. Additionally, the vehicle jerked and started to lose motive power. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 108,000.

Filed Aug 12, 2026 · Engine, Transmission · CA

At approximately 85,000 miles, the engine in my 2019 GMC Sierra 1500 seized. The vehicle was parked when it occurred. Inability to start. This created a safety risk because an engine seizure can cause sudden loss of propulsion in traffic. Before the failure, I did not notice any red flags. The problem was inspected and confirmed by a GMC dealer, which diagnosed the condition as an engine seizure. The failed engine is not available for inspection. I am not aware of the precise internal cause beyond the dealer’s diagnosis.