2019 GMC Sierra 1500 Common Problems & Defect Telemetry

“On XXX at approximately 3:00 p.m., I was driving on the highway in ..., at approximately 65 mph when my truck suddenly displayed a warning stating that all oil pressure had been lost and that the engine needed to be shut off immediately. Within roughly seven seconds of seeing ...”

“Engine seized on June29th while driving on I 64 . (6.2 L87) due to oil line failure. Engine replaced on July 18th, 2026. New engine started leaking oil from camshaft and gasket on August 10th 2026, back in GMC Shop on August12th 2026 for repairs, still waiting parts today. Sud...”

“My 2019 GMC Sierra 1500 AT4 equipped with the 6.2L engine experienced an internal engine/lifter failure. The vehicle was inspected by an authorized GMC dealership. The dealership documented damaged lifters, including rough edges and visible signs of friction, and advised that ...”

“At approximately 85,000 miles, the engine in my 2019 GMC Sierra 1500 seized. The vehicle was parked when it occurred. This created a safety risk because an engine seizure can cause sudden loss of propulsion in traffic. Before the failure, I didn't notice anything that would ra...”

“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 a...”

“The contact owns a 2019 GMC Sierra 1500. The contact stated that while at a red traffic light, the vehicle accelerated unintendedly, and the vehicle shuddered with an abnormal dinging sound coming from the vehicle. The message "Transmission Hot - Idle Engine" was displayed on ...”

“Complete failure on Cylinder 3 after AFM system caused lifter collapse in 5.3L V8. Lifter fell into cam shaft and scored the shaft at 55mph. Truck started surging and shaking violently. Truck shaking had me swerve to the side of the road as I was coming up on a crosswalk with ...”

“I am getting warning signs on the dashboard saying that my brake booster performance has failed and I need to service the brake booster , the brakes are very hard to press, I need longer stopping distances,and traction control and stability control towing harness my speed has ...”

“driving and truck started to misfire (due to collapsed lifter after shop diagnosis) that then made my truck do reduced steering assist and my wheel got super hard to turn that almost sent me in the ditch at 60MPH and also turned off my Electronic Stability Control and also tur...”

“I am retired and have always bought GM vehicles which are taken care of with required oil changes etc. This one I have only owned 25,000 mi each year (I have owned two years). So, when purchased it has high 50,000 miles not sure of exact, and it has only been driven 2 years. W...”

“The contact owns a 2019 GMC Sierra 1500. The contact stated that the trailer lights flashed intermittently while the vehicle is turned off. Additionally, the contact stated while driving with a trailer hitched to the vehicle, the messages "Trailer Disconnected" and "Trailer Co...”

“I was driving my 2019 GMC and all of a sudden I pulled into a subdivision the vehicle shut off and would not start again. I wasn't given an y warning or heard any sounds it shut off and would not start up again. I checked the battery and it was fine. I had it towed to a mechan...”

“On XXX at approximately 3:00 p.m., I was driving on the highway in ..., at approximately 65 mph when my truck suddenly displayed a warning stating that all oil pressure had been lost and that the engine needed to be shut off immediately. Within roughly seven seconds of seeing ...”

“There was a catastrophic internal engine failure, due to cam/lifter/bearing issues. This caused the timing chain and tensioner to jump and the engine to be out of alignment. This caused the valves to all be bent as a result. I believe that this has been an issue for longer tha...”

“While driving, the vehicle suddenly began running rough, losing power, and displaying engine warning lights. Due to the severity of the issue, the vehicle was towed to a GMC dealership for diagnosis. The dealership diagnosed lifter failure and a cracked cylinder head. The deal...”

“The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly hard downshifted. No warning lights were illuminated. The contact stated that the vehicle was hesitating while driving the rest of the drive. T...”

“Issue 1: Driver side front seat airbag connector separated disabling the airbag. (repaired at my cost) Issue 2: Transmission (10 speed auto) developed stutter and skip consistent with complaints resulting in recall of 2020 (next model year truck) due to risk of rear wheel lock...”

“On ... at approximately 2 pm the 2019 GMC Sierra 1500 AT4 (with 6.2 gas motor) motor died while I was driving in traffic. Incident #1 - The vehicle started sputtering and died - no alerts on dash until after the truck died - an empty fuel tank symbol briefly lit up on dash tha...”

“On May 27, 2026, I was on my way home from work when I went to accelerate the vehicle and all the sudden it started shaking and the check engine light came on with the EBS. I was able to get the vehicle to a repair shop local the next day, who took the car apart. What was thou...”

“6.2L engine lifters were replaced in 05/24. Complete engine failure in 09/25. Engine replaced with remanufactured engine. Fuel pump fail while driving on highway. Engine shutoff completely while driving 70mph. Prior to shut off engine struggled going over a bridge on I95 at 70...”

“The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 62 MPH, the vehicle lost motive power. There was no warning light illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the fuel pump module sensor had failed ...”