2024 GMC Sierra 2500 problems

Filed Oct 28, 2026 · NH

Purchased new and professionally installed and used for almost 3 years without issue. Driving on highway. Approx 75MPH. Cover was fully closed and locked into place. Nothing in bed of truck. Cover was attached to both of the safety D rings. I heard a noise, looked out rear mirror and saw the cover 10-15 feet in the air and then crash onto the highway. No one was behind me at the time or I would have likely caused a fatal accident. I immediately pulled off road. Ran back to where the cover was and had to wait for traffic to break before I could run into the highway and throw the cover off the side of the road into the woods. Cars were swerving out of the way to avoid the cover before I could get it. A few cars couldn’t get out of the way and ran it over. Luckily they were cars. If a motorcycle drove over it they would have crashed. I am very lucky no one died. Also, as you can see in the photos, the safety D rings on both sides of the bed were still intact and secured to the cover rails by the safety tether straps that were secured to the truck bed. Attached to the D rings are the safety brackets that appear to be made from a molded plastic. The brackets broke off the cover and remained attached to my truck. Potential major safety defect if the safety tether and D rings are still attached to my truck, but sheared off the heavy metal cover.

Filed Oct 23, 2026 · Acceleration, Fuel system · FL

I was returning from the airport in [XXX] with my kids, driving northbound on [XXX] when my truck engine turned off without warning. The truck began to slow down while I was surrounded by traffic going roughly 70mph. I had difficulty steering and braking because the vehicle engine was off. I attempted to restart the vehicle while it was coasting and slowing to dangerously low speeds in interstate traffic. The vehicle would not turn back on. I managed to change lanes through traffic and get to the emergency shoulder of the roadway and stop. I was shaken up over the incident, feeling very anxious about nearly causing an accident on the interstate. My kids were also very scared. I had the truck towed to the dealership after hours and had to get someone to pick my kids and me up on the side of the interstate with our luggage. The next day the service department diagnosed the failure of the fuel control module causing the engine to turn off and, as a result, the power steering and power brakes to fail. I was without my truck for over a day while it was being repaired. This is a known problem with GM vehicles, many models having been recalled for this very part failure. This should definitely be something that should be recalled and fixed in all GM vehicles with this part, including my vehicle which has not been recalled for this. I paid for the repair and would like also for GM to reimburse me for the expense. I have attached the invoice. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 7, 2026 · Engine · 17,520 miles · OK

The contact owns a 2024 GMC Sierra 2500. While the contact's husband was driving uphill approximately 32 - 34 MPH and hauling a trailer, the vehicle unexpectedly lost motive power and rolled backwards. The brake pedal was depressed, and the parking brake was engaged to stop the vehicle. OnStar and 911 were contacted. The trailer was towed to the residence, and the vehicle was towed to the dealer. The dealer determined that an unknown software update had caused the failure. The dealer performed a repair under TSB: 6318272, updated the engine control module software, and completed an oil change and tire rotation. The failure mileage was 17,520.

Filed Sep 24, 2026 · Electrical, Engine · CA

The vehicle experienced a loss of engine power accompanied by a check engine warning light and a “Reduced Acceleration”/reduced-power condition. The exact component causing the malfunction has not yet been determined. The vehicle and any affected components are available for inspection upon request. While driving the truck uphill toward our residence, the vehicle lost significant power and had difficulty maintaining acceleration. The truck stalled several times. The sudden loss of engine power while driving on an incline created a safety risk because the vehicle was unable to maintain normal acceleration and could potentially have stopped in traffic or created a hazard for other vehicles. The problem has not yet been confirmed or reproduced by a dealer or independent service center. The vehicle has experienced the problem while being driven, including the reduced-acceleration condition and multiple stalls. The vehicle will be inspected by a GMC dealer on Monday, September 28, 2026. The check-engine warning light illuminated, and the vehicle displayed a reduced-acceleration/reduced-power condition. The truck subsequently experienced significant loss of power while traveling uphill and stalled several times. These symptoms first appeared on September 14, 15, 22, and 23, 2026.

Filed Sep 23, 2026 · Fuel system · 54,238 miles · FL

The contact owns 2024 GMC Sierra 2500. The contact stated that while driving 25 MPH and depressing the accelerator pedal, the vehicle decelerated and stopped independently. A dealer was contacted. The vehicle was taken to the dealer and was diagnosed with fuel pump driver control module failure. The contact was informed that the fuel pump driver control module needed to be replaced. The contact associated the failure with Technical Service Bulletin: 24-NA-139 (Fuel Pump Driver Control Module stalling or no-start conditions); however, the VIN was not included in the TSB. The manufacturer was notified of the failure, and informed the contact that the vehicle was under warranty. The failure mileage was 54,238.

Filed Sep 16, 2026 · Electrical, Engine · ME

driving down the road going to and intersection the dash says I received a Service ESC message followed by a Reduced Acceleration warning on the center display. I also had the forward collision, traction control and check engine lights come on. I also noticed the shudder/jerk. The truck is giving a P060C code and when i was driving it dies in the intersection of the road and will not start back up. puts the computer in a safety mode. I have call my local GM dealer and they did not fix it and it happen twice. I the truck dies in the middle of the road and no way to start's it and if a big rig crashes in to the truck some one or more than one will be hurt or killed

Filed Sep 3, 2026 · Acceleration, Transmission · NY

While driving my truck on the highway at 65 mph the truck bucked hard and immediately downshifted into 2nd gear. This caused me to rapidly decelerate to approximately 40 mph, I am lucky there was not another vehicle behind me when this happened since rapid unexpected deceleration without brake lights is very dangerous. I had to drive the truck in limp mode at 45mph and approximately 4500 rpms to the nearest exit. This event illuminated the trucks check engine light and displayed a brief service 4WD message followed by a permanent reduced acceleration message on the dash.

Filed Sep 1, 2026 · Brakes, Steering · 40,832 miles · TN

The contact owns a 2024 GMC Sierra 2500. The contact stated that while driving 5 MPH, the vehicle lost brake and power steering functionality, and there was smoke coming from underneath the hood. The contact stated that power steering fluid was leaking onto the engine. No warning lights were illuminated. The vehicle was towed to a local dealer, where it was diagnosed, and the contact was informed that the power steering pump had seized, the belt and hoses had failed, and the parts needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 40,832.

Filed Aug 26, 2026 · Transmission · UT

The control valve body failed. There are so many, that there was a shortage of parts. Had to take it in as it went into limp mode. 34,000 miles. There were dozens of trucks, same year, waiting for the same repair. Shop says probably every truck will need it. It is a known issue.

Filed Aug 25, 2026 · Transmission · 76,300 miles · NY

The contact owns a 2024 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the rear axle unexpectedly locked up, and the vehicle stopped in the middle of the road. The rear axle independently released, and the vehicle was driven back to the residence. The dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 76,300.