Electrical System Related Problems of the 2021 GMC Sierra 1500

Table 1 shows six common electrical system related problems of the 2021 GMC Sierra 1500. The number one most common problem is related to the electrical system (56 problems). The second most common problem is related to the starter (one problem).

Table 1. Electrical System related problems of GMC Sierra 1500


Recently reported Electrical System problems of the 2021 GMC Sierra 1500

The Electrical System problem

Driving down road and had total loss of power steering and yes it is available for inspection. Almost drove it off the road due to loss of steering yes, it happened to be a failed main grounding strap that created the issue. The dealership made the repair.   Read details...

The Starter problem

[xxx], I purchased a 2021 GMC Sierra 1500 from faulkner Chevrolet in bethlehem, PA. I test drove the vehicle before purchase and it showed no indication of any mechanical issues that I was able to detect.   Read details...

The Wiring problem

The contact owns a 2021 GMC Sierra 1500. The contact stated while attempted to start the vehicle, the vehicle failed to operate as needed. The service parking brake, check engine, and other unknown warning lights were illuminated. The vehicle was towed to the local dealer to be diagnosed.   Read details...


Electrical System related problems in other GMC Sierra 1500 model year vehicles:



Sierra 1500 Service Bulletins
Sierra 1500 Safety Recalls
Sierra 1500 Defect Investigations