I am new to blazers and working on vehicles, so please bear with me... /forums/images/graemlins/tongue.gif 1. What are idler pulleys for? Belt tension? Mine has several flat spots on it and I was wondering it could be causing the squeaking and shuddering when idling. My chilton's manual doesn't say anything about it. 2. This one might sound stupid but...the tailgate on my blazer stops about 10 degrees from being parallel to the ground is that normal? I don't see how it could go down any further without hitting the bumper. Thanks!