2019 GMC SIERRA 1500 Complaints

The service engine light came on while driving on the highway. We took it to a GMC dealership and they scanned to determine a short in the oil pressure sensor. This was replaced then during the final check they found metal in the oil. The warranty company made them tear the engine apart where they found multiple area where the metal was worn down including the gaskets, rings, and cylinders. The warranty company continues to fight us to cover the whole invoice.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 75 MPH, the vehicle failed to accelerate as intended while depressing the accelerator pedal. There was an abnormal sound coming from the engine. No warning lights were illuminated. The contact stated that on a separate occasion, while driving at an undisclosed speed, blue and white smoke was coming from under the hood. The contact pulled over to the side of the road, and the smoke ceased. The contact opened the hood and inspected the engine. The contact restarted the vehicle, and the smoke started coming from under the hood again. The messages "Parking Brake Service Required”, “Reduced Steering Assist”, “Proceed with Caution" were displayed, and the check engine warning light was illuminated. The contact stated that while driving and coming to a stop, the engine jerked abnormally. The vehicle was taken to an independent mechanic, where it was diagnosed with oil intrusion into the spark plugs with a misfire in cylinder #6, and the piston rings were fractured, and there were scratches on the cylinder walls. The vehicle was not repaired. The contact stated that the failure persisted. The manufacturer was made aware of the issue. The contact was referred to the dealer for assistance. However, the contact was concerned about the damage to the engine and feared driving the vehicle. The vehicle was not taken to the dealer. The failure mileage was 71,799.

Luckily, truck was sitting in idle waiting on my wife and daughter to leave the store so we could go home. Engine began to run rough, and then died. Would not restart. Had this happened just a few moments later while in traffic, it could have been catastrophic for our family. GM dealership said the engine was nearly locked up and needed a new long block and several other ancillary parts. So far, we have no internal pictures and nothing was harmed externally.

Complete engine shutdown after multiple issues of truck using 5 quarts of oil in-between oil changes. Engine was rebuilt at dealer at out of pocket cost over 10000

There is a Service Bulletin on the Engine Oil Cooler line failure. It leaks or becomes detached form the crimp joint. Mine is leaking from the crimp joint and GMC says my VIN is not covered under this bulletin. N192220080 if this is a known issue on these vehicles why am I having to cover the costs for replacing a known faulty part. GMC said I could bring it in and have them perform the repair at my cost. The nearest service department is 100 miles away. I have it at a local mechanic that says it will cost anywhere from $1300 to $1500 to perform the repair.

5.3L V8 L84 Engine, 101,300 2nd owner Slowed down for traffic and was accelerating back to 80 when sudden loss of engine power coinciding with cylinder failure happened. Dealership determined lifter was collapsed. Lifter 1 failure at interstate speeds. Collapsed lifter caused damage to camshaft required both components to be replaced.

I live in Illinois, my 2019 GMC Sierra 1500 SLT has 51,318 miles on it as of 12/31/2025. What component or system failed or malfunctioned, and is it available for inspection upon request? Engine Oil Cooler hose line detaching from crimp - small oil leak currently. Not yet fixed. Available for inspection. How was your safety or the safety of others put at risk? If this component fails, all oil from the vehicle will be lost and inoperable. This could cause a traffic accident, especially if towing a load. Has the problem been reproduced or confirmed by a dealer or independent service center? Confirmed by an independent service center. I will be taking my vehicle to the local GMC service center for additional confirmations. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No, but GM has acknowledged the issue through these customer satisfaction surveys (CSP XXX/ XXX). Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There has been no failure yet. A small oil leak was found on my garage floor. My issue is that this is a known issue in cold weather climates. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Friday night coming home. While entering my driveway. The check engine light came on. The engine sounded really bad. Rough idling. Saturday morning. Took it to a mechanic shop. While on my way to the shop, the truck had loss of power. The first mechanic shop told me that the truck was having engine failure. Was not sure at the time but the L 87 is known for having lifters and bearing failure. Monday the truck was taken to the dealership Novak motors. For extended warranty, repair or possible engine replacement. It has been two weeks. Have not heard anything yet. But the timing of the incident was good. Because the engine failed when I was pulling in to my driveway.

THE VEHICLE IS AVAILABLE FOR INSPECTION - 35,000 APPROXIMATE MILES WITH A EBCM MODULE REPAIR NEEDED IN ORDER TO REPAIR IT TO A LEVEL THAT MEETS FEDERAL MOTOR VEHICLE SAFETY STANDARDS OF AT MINIMUM S5.3 NO.126 & S5.1 NO. 135 - I BELIEVE THIS VEHICLE SHOULD HAVE BEEN/SHOULD BE INCLUDED IN THE ORIGINAL AND/OR EXPANDED RECALL N192268091. THE VEHICLES ELECTRONIC BRAKE ASSIST IS NOT WORKING CAUSING IT TO BE DISABLED. IT HAS BEEN INSPECTED BY DENNY MENHOLT GMC. WARNING LAMPS/MESSAGE OCCURRED - DIAGNOSED - REPAIR NEEDED TO MAKE THIS VEHICLE SAFE FOR THE DRIVER, PASSENGER(S) AND OTHERS WHEN THE VEHICLE IS OPERATING.

On November 25th, 2025 I had my wife, kids and baby grandson in my truck driving approx 50 mph when the trailer brake light appeared on my dash. I thought that was strange since I was not pulling a trailer. Shortly after my truck felt like it was going to stall and complete loss of power. I pulled into a turn lane and coasted into a gas station parking lot. I put the truck into park and turned the motor off and then restarted it. The truck was running extremely poor and sounded like it had rocks loose in the motor. I had it towed into an automotive repair facility I have always used and they told me my engine was gone and had to be replaced. I had been told by an oil change company a few weeks before that this engine was under a recall. I checked into it but this model year was not included. I did further research and founded out that this model year was under review. Something needs to be done as I was lucky this was not a busy highway or this could have ended worse.