How to Replace Serpentine Belt 03-04 GMC Envoy XL

Difficulty: Intermediate · About 30 min · Gmc Envoy

Replace the serpentine belt on a 2003-2004 GMC Envoy XL.

Steps

1. Disconnect the battery

   Disconnect the negative cable with an 8mm wrench.

2. Remove the air intake hose

   Loosen its two clamps with a flat blade screwdriver, remove its T30 Torx bolt, then pull it up and off.

3. Remove the old belt

   Familiarize yourself with the routing diagram, attach a 15mm socket and ratchet to the tensioner, push it down to loosen the belt, pull the belt off the center pulley, carefully release the tensioner, then pull it up and out.

4. Install the new belt

   Loop it around the crankshaft pulley, over the water pump pulley, over the alternator pulley, around the power steering pump pulley and over the tensioner, double check the routing, attach the 15mm socket to the tensioner and push it down, pull the belt onto the center pulley, then carefully release the tensioner.

5. Reinstall the intake hose

   Set it into place, tighten its two clamps with a flat blade screwdriver, then tighten its T30 bolt.

6. Reconnect the battery

   Reconnect the negative cable with the 8mm wrench.

Check your vehicle’s repair manual for exact specifications and fit.