Table 1 shows nine common electrical system related problems of the 2015 GMC Sierra 1500. The number one most common problem is related to the electrical system (83 problems). The second most common problem is related to the integrated trailer brake control (two problems).
I remote started my truck, and when I got to it there was smoke and a flame coming from the rear power window. The remote start activates the rear defrosters, which started the electrical issues. I shut off the engine, and a loud pop followed, which was the shattering of the driver side rear window. Read details...
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at various speeds, the warning message "service trailer brake system" was displayed along with an audible warning chime although no trailer was being towed. Read details...
Has had an issue with accessories flashing off and back on. Reported it to a GMC dealer and they were unable to duplicate but said that the battery was bad and most likely what was causing it. It did fine for a while then began doing it again. Read details...