2005 Sierra cluster, blower motor, power window & lock problems
I have a 2005 gmc sierra thats had intermittent electrical issues for 2 years now. It usually only happens in the winter time. The door locks, windows, mirrors, blower motor, interior and dash lights and temp display on the rearview mirror go out sometimes on their own or when i step on the brake pedal. If i tap on the dash pad near the center most of the time all of these concerns correct themselves. Ive noticed too that every now and then the SERVICE BRAKE SYSTEM & SERVICE 4WD messages do come on in the DIC, ive cleaned the ground on the driver side frame rail and checked both grounds at the a-pillars. Fuses also seem ok and not sure where to go from here.