GM 30027273
Alternator

Begin generator replacement by discharging the negative Battery Cable and extracting the air cleaner hose. Remove the evaporative emission (EVAP) canister from its mounting bracket on the inner fender before disconnecting the generator electrical connector attached to the generator's rear end. Start by removing the generator battery terminal wire and nut and rubber protector from the terminal then unfasten both the upper and lower generator mounting bolts . Take the generator out of the vehicle while unlatching the Drive Belt from the generator pulley. First place the generator in its installation position then tighten the upper and lower generator mounting bolts only by hand. Connect the Drive Belt to the generator pulley before adjusting the Drive Belt tension until it reaches the recommended deflection values of 6 to 8 mm (0.24 to 0.31 inch) for used belts or 5 to 7 mm (0.20 to 0.27 inch) for new ones. The recommended Drive Belt deflection range is 6 to 8 mm (0.24 to 0.31 inch) for a used belt and 5 to 7 mm (0.20 to 0.27 inch) for a new Drive Belt. Torque down both generator mounting bolts to a final torque of 23 n.m (17 lb ft). Connect the generator electrical connector to its back section before installing the generator battery terminal wire with one secure nut tightened at 10 n.m (89 lb in). Follow this procedure: install the rubber protector on top of the generator battery terminal before reinstalling the evap canister to its inner fender mount along with attaching the air cleaner hose. To complete the procedure connect the negative Battery Cable before tightening the negative Battery Cable-to-negative battery terminal retainer to 15 n.m (11 lb ft).