nivensid
Newbie
1990 GMC Sierra, need to trouble shoot the back up lights. When I put the truck in reverse the back up lights don't usually come on until I start moving in reverse. They will flicker when I put in reverse but don't fully activate until I start moving in reverse. That is not good enough to pass inspection. Any ideas where to start looking? Is the back up switch part of the neutral safety switch or is there a dedicated switch on the transmission? It is an automatic. I am at work now just trying yo come up with a plan of action when I get the chance to work on it. Thanks