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Michael Moore
Category: Chevy
Satisfied Customers: 2956
Experience:  ASE Master/GM WORLD CLASS/GM Master/GM ASEP/Dodge Gold/Mazda cert.
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How to replace the serpentine belt on a 2002 Chevy Tahoe 5.3 liter V8 engine.

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I cannot find out how to loosen up the tension to get the serpentine belt back on. I had to replace the alternator.
The tensioner should be easy to move, Use a 15mm socket on the pulley bolt and you should beable to move and release the tensioner. If the pulley will not move, it might be frozen.

  1. Install a breaker bar with hex-head socket to the drive belt tensioner bolt.
  2. Rotate the drive belt tensioner clockwise in order to relieve tension on the belt.
  3. Remove the belt from the pulleys and the drive belt tensioner.
  4. Slowly release the tension on the drive belt tensioner.
  5. Remove the breaker bar and socket and from the drive belt tensioner bolt.
  6. Clean and inspect the belt surfaces of all the pulleys.

This is the belt tensioner

Object Number: 647789  Size: SH
Object Number: 678802  Size: SH

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