2015 GMC Sierra 1500 driver assistance problems

Filed Jun 20, 2025 · Driver assistance, Transmission · AL

I am reporting a critical issue with the transmission. The transmission frequently slips, hesitates, and jerks unexpectedly during acceleration and gear shifts. On multiple occasions, the vehicle has lost power or failed to respond while entering intersections, merging onto highways, or attempting to accelerate—posing a serious safety risk. The issue often occurs without warning and has worsened over time. Additionally, there are instances of harsh downshifting, delayed engagement from park to drive, and sudden lurching forward or backward, which could easily result in a collision. Despite visits to the dealership and complaints made, the issue has not been resolved, and I’ve learned that many other owners of this same model have reported nearly identical symptoms. This appears to be a systemic problem with the transmission system. Given the safety risk, especially in traffic and at high speeds, I strongly believe this defect warrants immediate investigation and a formal recall.

Filed Mar 18, 2023 · Brakes, Driver assistance · NE

Trailer brake system message keeps showing up on my dash and it’s not safely to drive

Filed Aug 8, 2022 · Brakes, Driver assistance · IN

Trailer brake system Warning

Filed May 20, 2022 · Driver assistance, Electrical · AZ

When driving the truck it shuts off and then it turns back on. The stabilizer light goes on. It has happened many times while driving and also when backing up. I need to know any specific information why is it doing it, I have taken it to the dealership and they never have found the issue.

Filed Jun 2, 2021 · Driver assistance, Electrical · 78,000 miles · GA

The contact owns a 2015 GMC Sierra 1500. The contact stated while driving at various speeds, the vehicle loss motive power with the service stabilitrak warning light illuminated. The vehicle was restarted and operated as intended. The dealer was contacted and the contact was informed that the VIN was not under recall. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 78,000.

Filed Aug 11, 2020 · Brakes, Driver assistance · 60,000 miles · WY

The vehicle is stalling when braking and getting ready to turn. My truck is showing stabilitrak service intermittently and I've almost been in a crash 3 times because of this. The vehicle only restarts after placing in park. This is not safe when in traffic. There seems to be no recalls and no known cause. Someone is going to die if gm doesn't fix this. I've been on forums and it's a common problem. It should be fixed by gm if it is so common. This happens when approaching cross traffic at an intersection and I lose all control of steering braking and power to the truck.

Filed Aug 3, 2020 · Driver assistance · 63,845 miles · WY

When braking and turning at low speeds the vehicle stalls with service stabilitrak warning.

Filed Dec 19, 2019 · Brakes, Driver assistance · 65,000 miles · TX

Tl* the contact owns a 2015 gmc sierra 1500. The contact received a recall notice for the federal safety agency campaign number: 19v761000 (electronic stability control, service brakes, hydraulic, service brakes). The contact took the vehicle to finnegan chevrolet buick gmc (26529 southwest fwy, rosenberg, tx 77471, (281) 342-4200) to be serviced for the software update. After the contact had the vehicle repaired per the recall, while driving at a low rate of speed, the brakes failed to operate without warning. The vehicle was towed back to the dealer where it was diagnosed with a faulty brake vacuum pump. The manufacturer was notified of the failure and did not assist because the vehicle was previously repaired per the recall. The vehicle was not repaired. The failure mileage was 65,000.

Filed Nov 1, 2019 · Brakes, Driver assistance · 32,000 miles · IN

Tl* the contact owns a 2015 gmc sierra 1500. The contact stated that the vehicle exhibited reduced braking power when driving at low speeds. The vehicle was taken to mike raisor buick gmc (2912 main street, lafayette, indiana 47904, (765) 273-4954) for the federal safety agency campaign number: 19v645000 (service brakes) in august of 2019. Within a couple of weeks, the brake system failure worsened after the repair. The contact also experienced reduced braking power when driving at high speeds. In addition, the brake assist feature failed before the vehicle was stopped. The contact stated that the stopping distance was significantly longer. The manufacturer was contacted. The vehicle was not diagnosed or repaired. The failure mileage was 32,000.

Filed Jun 27, 2019 · Driver assistance, Electrical · 41,000 miles · WI

Intermittently losing power steering. Stability track light comes on for no apparent reason, headlights dim when applying brakes.