Installation of serpentine belt for 1997 GMC Sierra 5.7 truck

Does your vehicle have the belt map above the radiator yet? If not you'll have to sort of figure it out by looking at it. Keep in mind the smooth side of the belt will never touch a grooved pulley, and the grooved side of the belt will never touch a smooth pulley. Then use a wrench to pull the belt tensioner up so you can hook the belt around it. Hope that helps, if not please ask for assistance.