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 (65 problems). The second most common problem is related to the wiring (one problem).
I own a 2021 GMC sierra at4 3. 0l duramax (VIN [xxx]). The vehicle has codes p1098 (coolant control valve performance) and p129f which coincides with the first code. My dealer believes this is consistent with an engine coolant control valve failure. Read details...
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...
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving 60 mph, there was an abnormal knocking sound coming from the engine compartment, after which the vehicle lost motive power. The contact was able to pull over to the shoulder of the roadway, where the vehicle failed to restart. Read details...