GMC Sierra 1500 owners have reported 1,141 electrical system related problems since 1996. Table 1 shows the 32 most common electrical system problems. The number one most common problem is related to the vehicle's electrical system (907 problems). The second most common problem is related to the vehicle's instrument panel (110 problems). For details of each of the problem category, use the links in the table.
While driving at highway speed, my 2025 GMC sierra suddenly began slowing down without warning and lost propulsion. When I pressed the accelerator, there was no acceleration response. The vehicle felt like it was braking or dragging instead of accelerating, creating a serious crash risk in traffic. Read details...
The contact owns a 1999 GMC Sierra 1500. While the vehicle was in neutral, the instrument panel gauges failed and flickered without warning. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was unknown. Read details...
My 2019 2500hd (49,00 miles) truck had water leaking in through the roof. The dealership found that the leak was caused by a bad factory tack weld on the passenger side roof seam. Due to this bad tack welkd, it caused water to leak down the a-piller, down into my electrical fuse box and wiring. Read details...
On several occasions spanning multiple years the truck loses power while braking and turning at slow speeds. On more rare occasions, but still numerous, the same problem occurs when braking at higher speeds without turning. Read details...
--unwanted reduction in the front hvac blower speed and loss of radio, auto ac not working as designed --driver seat vibrating as the lane departure warning activated; I had turned the seat vibrate function off on 25 June 2023. Read details...