Envoy, Rainer, Trailblazer 2006-2007

Accessory Drive Belts

Print

Adjustment



Serpentine belts are automatically tensioned by a system of idler and tensioner pulleys, thus require no adjustment. The serpentine belt tension can be checked by simply observing the belt acceptable belt wear range indicator located on the tensioner spindle. If the belt does not meet the specified range, it must be replaced.


NOTE
A belt is considered -used'' after 15 minutes of operation.



Click image to see an enlarged view

Fig. Check the belt tension by simply observing the range indicator located on the tensioner spindle

Drive Belt Routings





Click image to see an enlarged view

Fig. Accessory serpentine belt routing-4.2L engines



Click image to see an enlarged view

Fig. Accessory drive belt and A/C belt routing-5.3L and 6.0L engines

Inspection



Inspect the drive belt for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately.

Removal & Installation



4.2L Engine
  1. Install 3 / 8  inch breaker bar on the drive belt tensioner arm and turn the breaker bar clockwise enough to relieve the tension on the drive belt.
  2.  
  3. Remove the drive belt.
  4.  
  5. Release the tension on the tensioner arm.

    Click image to see an enlarged view

    Fig. Accessory serpentine belt routing-4.2L engines

  6.  

To install:

  1. Route the drive belt over all the pulleys except the drive belt tensioner pulley.
  2.  
  3. Install the 3 / 8  inch breaker bar on the drive belt tensioner arm and turn the breaker bar clockwise.
  4.  
  5. Install the drive belt over the drive belt tensioner pulley.
  6.  
  7. Slowly release the tension to the drive belt tensioner arm.
  8.  
  9. Inspect for proper installation of the drive belt on the pulleys.
  10.  

5.3L & 6.0L Engines
A/C Compressor Belt
  1. Remove the accessory drive belt.
  2.  
  3. Raise the vehicle.
  4.  
  5. Install a ratchet into the square opening of the air conditioning (A/C) belt tensioner.
  6.  
  7. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt.
  8.  
  9. Remove the A/C belt from the pulleys.
  10.  
  11. Slowly release the tension on the A/C belt tensioner.
  12.  
  13. Remove the ratchet from the A/C belt tensioner.
  14.  
  15. Clean and inspect the belt surfaces of all the pulleys.

    Click image to see an enlarged view

    Fig. Accessory drive belt and A/C belt routing-5.3L and 6.0L engines

  16.  

To install:

  1. Install the A/C belt around the crankshaft balancer.
  2.  
  3. Install a ratchet into the square opening of the A/C drive belt tensioner.
  4.  
  5. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt.
  6.  
  7. Install the A/C belt over the idler pulley.
  8.  
  9. Install the A/C belt around the A/C compressor pulley.
  10.  
  11. Slowly release the tension on the A/C belt tensioner.
  12.  
  13. Remove the ratchet from the A/C belt tensioner.
  14.  
  15. Inspect the A/C belt for proper installation and alignment.
  16.  
  17. Lower the vehicle.
  18.  
  19. Install the accessory drive belt.
  20.  

Accessory Drive Belt
  1. Remove the air cleaner outlet duct.
  2.  
  3. Install a breaker bar with hex-head socket to the drive belt tensioner bolt.
  4.  
  5. Rotate the drive belt tensioner clockwise in order to relieve tension on the belt.
  6.  
  7. Remove the belt from the generator pulley.
  8.  
  9. Slowly release the tension on the drive belt tensioner.
  10.  
  11. Remove the breaker bar and socket and from the drive belt tensioner bolt.
  12.  
  13. Remove the belt from the remaining pulleys.
  14.  
  15. Clean and inspect the belt surfaces of all the pulleys.

    Click image to see an enlarged view

    Fig. Accessory drive belt and A/C belt routing-5.3L and 6.0L engines

  16.  

To install:

  1. Route the drive belt around all the pulleys except the generator pulley.
  2.  
  3. Install the breaker bar with hex-head socket to the belt tensioner bolt.
  4.  
  5. Rotate the belt tensioner clockwise in order to relieve the tension on the belt.
  6.  
  7. Install the drive belt on the generator pulley.
  8.  
  9. Slowly release the tension on the belt tensioner.
  10.  
  11. Remove the breaker bar and socket from the belt tensioner bolt.
  12.  
  13. Inspect the drive belt for proper installation and alignment.
  14.  
  15. Install the air cleaner outlet duct.
  16.  

 
label.common.footer.alt.autozoneLogo