How do you Change, Replace, or Install 1999-2002 Chevrolet Silverado, Tahoe, GMC Sierra, Yukon Alternator Replacement
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Step 1: Open the vehicle's hood.
Step 2: Using the 8mm socket/ratchet, disconnect the vehicle's negative battery cable.
Step 3: Using the flathead screwdriver, loosen the clamps (2) and remove the air intake hose from the vehicle.
Step 4: Loosen and remove the 8mm bolt (1) that secures the engine cover to the assembly. Remove this cover.
Step 5: Disconnect the alternator's wiring harness (1).
Step 6: Remove the connection cover on the BACK of the alternator. Loosen and remove the 10mm bolt (1).
Step 7: Loosen the 15mm tensioner pulley bolt (1). You can now remove the belt from the vehicle.
If your belt looks frayed or worn, it's a great time to replace it. After all, we have it removed, and it will never be easier than it is right now!
Step 8: Loosen and remove the 15mm mounting bolts (2) that secure the alternator to the engine.
Step 9: Using the flathead screwdriver as a lever, pry the alternator from its position. You can now remove it from the vehicle.
Step 10: Mount the new alternator by tightening the 15mm mounting bolts (2).
Step 11: Tighten the 10mm bolt (1) for the battery lead, and cover the bolt with the rubber boot.
Step 12: Connect the alternator's wiring harness (1).
Step 13: Using the routing diagram provided near the radiator, route the belt and secure it by tightening the 15mm tensioner bolt.
The belt should be taut, but not overly tight.
Step 14: Secure the engine cover by tightening the 8mm bolt (1).
Step 15: Reattach the air intake hose. Secure it by tightening the flathead clamps (2).
Step 16: Reconnect the battery's negative cable.
These Part Change / Installation Instructions Apply to
02 2002, 01 2001, 00 2000, 99 1999 Chevrolet Silverado, Tahoe, GMC Sierra, Yukon Alternator Replacement Instructions
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