How to Replace Serpentine Belt 90-99 GMC Sierra K1500
Difficulty: Beginner · About 2 min · Gmc Sierra K1500
Replace the serpentine belt on a 1990–1999 GMC Sierra K1500 by documenting the routing, relieving the tensioner, and verifying the belt sits in every pulley groove.
Parts and supplies
- Correct replacement serpentine belt
Steps
Record the belt routing
With the engine off, photograph the belt path or use the underhood routing diagram. Inspect the pulleys for damage and identify the tensioner access point.
Remove the old belt
Fit a suitable ratchet to the tensioner and rotate it to release belt tension. Slip the belt off an accessible pulley, then ease the tensioner back slowly.
Install the replacement belt
Route the new belt around each pulley according to the diagram, leaving the tensioner pulley for last. Rotate the tensioner and slide the belt into place.
Check belt seating
Release the tensioner gradually and inspect every ribbed pulley to ensure the belt sits centered in its grooves. Start the engine briefly and check for tracking noise.
Check your vehicle’s repair manual for exact specifications and fit.