How do you install a serpentine belt on a 1998 Chevy Pickup truck?
First, get a new serpentine belt. There is a de-tensioning
wrench that you can borrow from Kragen Auto Parts, or Pep Boys.
This wrench is at least 3 feet long, and you attach it to your
alternator's back end, which has a bar-metal spring tensioner. The
wrench bends back this tensioner spring, which allows you to remove
the old belt, and put in the new belt.