How to Replace Serpentine Belt Tensioner with Pulley 96-04 GMC Sonoma

Difficulty: Intermediate · About 30 min · Gmc Sonoma

Replace the serpentine belt tensioner, with pulley, on a 1996-2004 GMC Sonoma.

Steps

1. Remove the old belt

   Note the routing diagram, fit a 3/8 inch drive ratchet into the tensioner, turn it down to slacken the belt, then pull it off the alternator and free.

2. Remove the old tensioner

   Loosen its single 13mm bolt and take it off.

3. Install the new tensioner

   Insert it, then tighten its 13mm bolt to about 25-30 ft-lb.

4. Reinstall the belt

   Loop it around the crank, water pump, power steering, A/C and alternator pulleys per the diagram, use the 3/8 inch ratchet to relieve the tensioner and work it around the idler pulley last, then release.

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