My GMC sls is having some type of electrical issue .I took it to the shop he said I needed to replace my Bcm i did had it flashed problem still Exists. I Start the truck give it gas as soon as the truck vibrate The headlights start to Flickr The highbeams indicator will come on the dash the truck will die and lock me out. I poped the cap off the Starter relay I can start it again from there but it soon as I try to drive it or revit up it dies it will idol fine
