Step 2: Locate the belt routing diagram that is usually posted near the radiator, on the UNDERSIDE of the hood, or in the owner's manual.
Step 3: Using the 3/8 drive ratchet handle, insert the square peg into the belt tensioner and turn it CLOCKWISE. This will release the tension on the belt. Once you have the belt off of a pulley or two, slowly release the tensioner back to its resting position.
Step 4: Using the diagram we found in Step 2, route the belt around the proper pulleys.
Step 5: Once the belt is in place, use the 3/8 drive ratchet handle to turn the tensioner COUNTER CLOCKWISE. This will increase the tension on the belt.
NOTE: The belt should be taut, but not overly tight or stretched!
These Part Change / Installation Instructions Apply to
06 2006, 05 2005, 04 2004, 03 2003, 02 2002 Chevrolet Trailblazer Serpentine Belt Replacement Instructions