Break lights activate by them selves. Can be driving, parked, vehicle off. Parked and locked. The break lights activate randomly. Most recently car was parked in drivevway over the coarse of 2 days. Break lights came on and off until batteries were dead. When parked I Can hear clicking noise coming from under the hood periodically, not sure if related or not. Also noticed cruise control will shut its self off some times.

- Severna Park, MD, USA

Traveling I-81 S in Maryland, approximately mile 290, accelerator stuck in full throttle. I had accelerated to pass a car, but the accelerator went to full throttle, and stuck on full acceleration. I stayed in the left lane, applied brakes sporadically to limit the increased speed, and quickly hit the accelerator pedal with my foot and immediately released several times to try to "break" the accelerator free. I did this multiple times with no results until finally, when we were at 94 mph, the accelerator broke free, and disengaged. The brakes smelled strongly from the efforts to retain the acceleration. The truck had approximately 2,300 miles on it when this occurred. I had planned to put the truck in neutral and move off the road before we hit 100 mph. If my husband had been driving, he might have turned off the car and lost control (due to loss of power). This was extremely troubling, and extremely dangerous. Thankfully, traffic was limited enough not to cause a worse outcome. I contacted my dealer and the dealer where I was traveling to.

- Laurel, MD, USA

My 2017 GMC 2500 Sierra denali duramax has had this throttle issue, it seems to only do it when the exhaust stinks, and at speeds between 5 - 55 mph. If I take my foot off the accelerator the truck maintains RPM (1200 - 1400) or even has increased some and has lasted 2 - 5 seconds (estimated and greatly reduces the effectiveness of the braking capacity and responsiveness/stopping distance). Worst was with a huge trailer behind and I got up to speed 55 on county hwy 8, and I let off the accelerator and it kept going hard and I got on the brakes and I couldn't slow it down until the truck decided to release off the throttle.(two witnesses in the vehicle, one a GM tech, stating your vehicle is not safe and needs to be looked at) it's happened about 25 times in 5700 miles in various settings & speeds and has occurred frequently in town at speeds of 25 - 35 mph. There maybe several hundred miles in between episodes if you will, as they occur in clusters when exhaust stinks and gone when exhaust does not stink. Truck also had torque converter not unlock and [xxx] near choked the engine off at stop sign right after a throttle stuck condition. Got home the other night and fuel gauge stopped working! back up camera is daylight bright at night, low coolant issues, map sensor issue, engine surged the other day, what next" it's constantly been at dealerships with no answers. My wife won't drive it anymore and wishes I wouldn't either fearing it will cause an accident and she's probably right. GM has stated they are aware of the problem but will not provide any trade in assistance dollars to get it off the road and there is no fix. $70,000+ truck, lives at risk and no serious response from GM" parts of this document have been redacted to protect personally identifiable information pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Wausau, WI, USA