Serpentine Belt Replacement - 1994 Chevy Astro

First, check for the serpentine belt path drawing on the firewall,which will guide you in removing and replacing the belt. Here is a link to a picture of the scenario: http://greatautohelp.com/How-To/Replace-V8-Truck-Belt.html If the belt has broken and you have no idea how to route the replacement belt, you can contact a Chevy or GM dealer (the GMC Safari is the same vehicle) for help. I understand that it will take two people to do this job since arm reach is crucial. Use a crowbar, lever against the idler pulley and reduce the tension on the idler pulley, and slip the old serpentine belt off. You can tell the idler pulley from the other pulleys as it has no accessory attached, but its out from its attachment to the large accessory mounting plate bolted to the block. Making sure the grooves are on the inside of the belt, loosely thread the new belt around the existing accessories (use the diagram as a guide), force the idler pulley back and loop the belt over it. Gently reduce the force on the idler pulley, Hope it helps.