2019 GMC Sierra owner complaints

ECM completely failed during drive no previous warnings

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 includ

While traveling in high-speed traffic, the vehicle experienced a sudden and catastrophic mechanical engine failure without any prior warning lamps, messages, or symptoms. The failure manifest as a loud, rhythmic ticking and knocking noise immediately followed by a sudden loss of propulsion and severe engine shuddering. Safety Risk: The loss of power occurred in active traffic, creating an immediate crash hazard. Because the engine could no longer maintain speed, I experienced multiple near-miss collisions while attempting to navigate the vehicle to safety. This "limp mode" state placed myself and other motorists at extreme risk of a rear-end or side-impact collision. Component & Inspection: The failed component is the engine (6.2L L87 V8), specifically believed to be a failed lifter or b

We were driving down a farm to market road at about 50 mph pulling an empty cattle trailer when we had a severe power loss, lots of dash lights and warnings. I noticed white smoke coming from the tail pipe. We limped it back to the house and unhooked the trailer and idled it into the Chevrolet dealership in Portland TX. The dealership just called and they said the #5 cylinder failed, there is metal in the oil and it will need an engine replacement at a cost of over $11,000.00. The truck is a 2019 and has just over 54,000 miles on it. No engine should fail at 54,000 miles and no company should sell one that does. Pulling a loaded trailer at highway speeds with a total engine failure could easily cause death to passengers and livestock. 12122025

Tl* the contact owns a 2019 GMC sierra 1500. While driving approximately 25 MPH and attempting to brake, the brake pedal traveled all the way to the floorboard. Also, the ABS, check engine, brake, and differential warning indicators illuminated. In addition, the service trailer brake system, service ESC, steering assist reduced, drive with care and brake system failure system top speed 62 MPH messages appeared on the message board. The vehicle was towed to ingersoll auto of danbury (84 federal rd, danbury, ct 06810). The same dealer repaired the vehicle on december 28, 2019 per NHTSA campaign numbers: 19v814000 (seat belts) and 19v889000 (service brakes, hydraulic, electronic stability control, service brakes). The manufacturer was not notified of the failure. The vehicle was not repaired.

New truck, GMC 1500 denali, 1100 miles, started vehicle with multiple warning sounds & warning lights, dash says "brake system failure 62mph top speed", service trailer brake system", steering assist is reduced drive with care" service ESC", braking was completely reduced & needed hard press on brake to try and get vehicle to stop. Very diminished braking. Vehicle was stationary in a parking lot when this happened on restart.

After starting my truck I got the following messages service ESC service trailer brake brake system failure - 62 MPH top speed steering assist reduced drive with care thought I would just limp it home although after leaving my parking spot I realized that I had almost no brakes at a all. I re parked the truck and had it towed to the dealership which is telling me that they reset the codes but that there is a possibility of it happening again. No brakes at highway speeds would be disastrous!

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.

I was driving up the road truck cranked up fine started a morning commute, on cruise control the truck instantly out of nowhere lost power completely with no signs of anything and engine won’t attempt to turn over now. I fear the worst has happened which would be catastrophic internal failure for to a faulty engine & its internals.

When accelerating it will over rev and then slip and then punch foward I had a diagnostic did and the sensor in the Transmission aren't working properly and then when just driving my etrak also randomly went out and I can no longer active cruise controll

The contact owns a 2019 GMC Sierra 1500. The contact stated that in the first month that the vehicle was purchased, the vehicle intermittently hesitated before slamming into gear hard. No warning lights were illuminated. The vehicle was taken to the dealer, and the contact was informed that the manufacturer was aware of the failure and suggested that a triple fluid flush was needed, and the triple fluid flush was performed. The contact stated that the hard shifting persisted, especially while driving uphill. The vehicle was taken back to the dealer, where it was diagnosed and determined that the torque converter had failed and needed to be replaced. The vehicle was not repaired. The failure persisted, and the vehicle remained at the contact's parents' residence unrepaired. The manufacturer

Rear wheel brakes unexpectedly lock up after driving over a hour or more

Subject: Potential Issue Related to Recall N202314870 for GMC Sierra 1500 Problem Description: I own a 2019 GMC Sierra AT4 (VIN# [XXX] ) and have identified a potential issue related to the drive shaft. Although my VIN does not appear in the official system as affected by recall N202314870, the vehicle exhibits the following symptoms: 1. Unusual and consistent vibrations in the drivetrain while the vehicle is in motion. 2. Noises coming from both the front and rear differentials. 3. Concern regarding the integrity of the drive shaft, as these issues align with the details described in the recall. Given that this issue potentially affects the safety of the vehicle, I kindly request a review to determine if my unit should be included in recall N202314870 or any other related camp

When backing up in the dark the backup camera goes to full brightness and is very disorienting and makes using you mirrors very difficult since your eyes are adjusted to the dark. Using the backup camera screen is useless due to how bright it is. Happens when vehicle is stationary or in motion.

When put into reverse, the screen from backup camera is overly bright making it difficult to use the side mirrors as the operators night vision is compromised.

Rear left roof is leaking into the interior of the cab. Water is / was noticed during rain and car wash. In the attached picture I have highlighted were the water is coming into the inside of the cab. Water can also be seen in the inside of the rear window and on the leather of the seats. This happens whether the vehicle is parked or driving. It was noticed at 1800 miles and its less then a month old.

The lights on the dashboard is indicating that the hood is unlocked and the security system is being tampered with. Hood is closed and it disengage auto start and the alarm goes off every 10 minutes.

Incident 12/29/2024 while making a stop at a Stop sign while making a left turn steering wheel broke free with no resistance what so ever??? Turned off the vehicle opened the hood discovered the intermediate steering shafts had separated??? retaining bolt missing causing shafts to slip out of each other, putting my life & passenger's at high risk how this happened there is no explanation to this factory defect.

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at 10 MPH, the upper control arm and ball joint on the passenger’s side fractured, and the wheel partially detached from the vehicle and was sticking out. The vehicle was towed to an independent mechanic where it was diagnosed and the failure was confirmed; additionally, the driver’s side upper control arm and ball joint were also fractured. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mile was approximately 71,000.

The contact owns a 2019 GMC Sierra. The contact stated that while driving on the highway at 40 MPH the vehicle proceeded to jerk and shift into the lower gears, the vehicle's acceleration speed was reduced to 15 MPH. The service parking brake and the ESC light were illuminated. The contact proceeded to drive to their residence, whereupon parking the vehicle the contact proceeded to inspect the vehicle from outside, the contact noted that there was a distinct smell of something burning, and upon inspecting the rims of the vehicle they were very hot. The vehicle was taken to a local dealer where the vehicle was diagnosed the contact was advised that there was nothing to be found wrong with the vehicle. The vehicle was not repaired. The manufacturer was notified of the failure. The approximat