Table 1 shows seven common electrical system related problems of the 2020 GMC Sierra 1500. The number one most common problem is related to the electrical system (68 problems). The second most common problem is related to the car will not start (three problems).
Fire started under passenger side front seat dashboard when rear defrost was turned on. Read details...
- the ground strap corroded and broke apart. Yes, I have the ground cable that failed, if needed for inspection. - yes!!! the truck's steering kept going in and out of manual steering and the engine reduced in speed allowed, and then the engine cut out on me completely - while I was in the middle Read details...
On two separate occasions, the truck has been dead when attempting to crank. There were no lights or devices left on after the previous time the truck had been used. Something is drawing power from the battery causing it to be dead. Read details...