Escalade, Suburban, Tahoe, Yukon, Denali, DenaliXL, YukonXL 1999-2005

Accessory Drive Belts 2

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Removal & Installation



Belt replacement is a relatively simple matter rotating the tensioner off the belt (to relieve tension) and holding the tensioner in this position as the belt is slipped from its pulley. The tensioner arm contains a machined receiver for a 3 / 8 in. driver from a ratchet or breaker bar.

Click image to see an enlarged view

Fig. On this 4.3L engine, a large wrench (16mm) was used to pivot the belt tensioner and free the belt

  1. Before you begin, visually confirm the belt routing to the engine compartment label (if present) or to the appropriate diagram in this section (if the label is not present). If you cannot make a match (perhaps it is not the original motor for this vehicle), scribble your own diagram before proceeding.
  2.  
  3. Disconnect the negative battery cable for safety.
  4.  
  5. Install the appropriate sized breaker bar, wrench, or socket to the tensioner arm or pulley, as applicable.
  6.  
  7. Rotate the tensioner to the left (counterclockwise) and slip the belt from the tensioner pulley.
  8.  
  9. Once the belt is free from the tensioner, CAREFULLY rotate the tensioner back into position. DO NOT allow the tensioner to suddenly snap into place or damage could occur to the assembly.
  10.  
  11. Slip the belt from the remaining pulleys (this can get difficult is there is little room between the radiator/fan assembly and the accessory pulleys. Work slowly and be patient.
  12.  
  13. Once the belt is free, remove it from the engine compartment.
  14.  

To install:

  1. Route the belt over all the pulleys except the water pump and/or the tensioner. Refer to the routing illustration that you identified as a match before beginning.
  2.  
  3. Rotate the tensioner pulley to the left (counterclockwise) and hold it while you finish slipping the belt into position. Slowly allow the tensioner into contact with the belt.
  4.  
  5. Check to see if the correct V-groove tracking is around each pulley.
    WARNING
    Improper V-groove tracking will cause the belt to fail in a short period of time.

  6.  
  7. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Accessory serpentine belt routing-4.8L, 5.3L and 6.0L engines



    Click image to see an enlarged view

    Fig. Accessory serpentine belt routing-4.3L, 5.0L and 5.7L engines without A/C



    Click image to see an enlarged view

    Fig. Accessory serpentine belt routing-4.3L, 5.0L and 5.7L engines with A/C



    Click image to see an enlarged view

    Fig. Accessory serpentine belt routing-6.5L Diesel engines



    Click image to see an enlarged view

    Fig. Accessory serpentine belt routing-6.6L Diesel engines



    Click image to see an enlarged view

    Fig. Accessory serpentine belt routing-7.4L engine



    Click image to see an enlarged view

    Fig. Accessory serpentine belt routing-8.1L engine

  8.  

Belt replacement is a relatively simple matter rotating the tensioner off the belt (to relieve tension) and holding the tensioner in this position as the belt is slipped from its pulley. The tensioner arm contains a machined receiver for a 3 / 8 in. driver from a ratchet or breaker bar.

Click image to see an enlarged view

Fig. A large wrench (16mm) can be used to pivot the belt tensioner and free the belt

  1. Before you begin, visually confirm the belt routing to the engine compartment label (if present) or to the appropriate diagram in this section (if the label is not present). If you cannot make a match (perhaps it is not the original motor for this vehicle), scribble your own diagram before proceeding.
  2.  
  3. Disconnect the negative battery cable for safety.
  4.  
  5. Install the appropriate sized breaker bar, wrench, or socket to the tensioner arm or pulley, as applicable.
  6.  
  7. Rotate the tensioner to the left (counterclockwise) and slip the belt from the tensioner pulley.
  8.  
  9. Once the belt is free from the tensioner, CAREFULLY rotate the tensioner back into position. DO NOT allow the tensioner to suddenly snap into place or damage could occur to the assembly.
  10.  
  11. Slip the belt from the remaining pulleys (this can get difficult is there is little room between the radiator/fan assembly and the accessory pulleys. Work slowly and be patient.
  12.  
  13. Once the belt is free, remove it from the engine compartment.
  14.  

To install:

  1. Route the belt over all the pulleys except the water pump and/or the tensioner. Refer to the routing illustration that you identified as a match before beginning.
  2.  
  3. Rotate the tensioner pulley to the left (counterclockwise) and hold it while you finish slipping the belt into position. Slowly allow the tensioner into contact with the belt.
  4.  
  5. Check to see if the correct V-groove tracking is around each pulley.
    WARNING
    Improper V-groove tracking will cause the belt to fail in a short period of time.

  6.  
  7. Connect the negative battery cable.
  8.  

4.8L, 5.3L And 6.0L Engines
Accessory Drive Belt
  1. Loosen the air cleaner outlet duct clamps at the following locations:

    Throttle body
     
    Mass airflow/intake air temperature (MAF/IAT) sensor
     

  2.  
  3. Remove the radiator inlet hose clip from the outlet duct.
  4.  
  5. Remove the air cleaner outlet duct.
  6.  
  7. Install a breaker bar with hex-head socket to the drive belt tensioner bolt.
  8.  
  9. Rotate the drive belt tensioner clockwise in order to relieve tension on the belt.
  10.  
  11. Remove the belt from the pulleys and the drive belt tensioner.
  12.  
  13. Slowly release the tension on the drive belt tensioner.
  14.  
  15. Remove the breaker bar and socket and from the drive belt tensioner bolt.
  16.  
  17. Clean and inspect the belt surfaces of all the pulleys.

    Click image to see an enlarged view

    Fig. Location of accessory belt tensioner-4.8L, 5.3L & 6.0L Engines

  18.  

To install:

  1. Route the drive belt around all the pulleys except the idler 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 tensioner.
  6.  
  7. Install the drive belt under the idler 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.
    NOTE
    Align the arrow at the throttle body end of the duct with the throttle body attaching stud.

  14.  
  15. Install the air cleaner outlet duct.
  16.  
  17. Install the radiator inlet hose clip to the outlet duct.
  18.  
  19. Tighten the air cleaner outlet duct clamps at the following locations:

    Throttle body
     
    MAF/IAT sensor
     

  20.  
  21. Tighten the air cleaner outlet duct clamp screws to 62 inch lbs. (7 Nm).
  22.  

Air Conditioning Belt
  1. Remove the accessory drive belt.
  2.  
  3. Raise and suitably support the vehicle.
  4.  
  5. Remove the engine shield bolts.
  6.  
  7. Remove the engine shield.
  8.  
  9. Install a ratchet into the air conditioning (A/C) belt tensioner adapter opening.
  10.  
  11. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt.
  12.  
  13. Remove the A/C belt from the pulleys.
  14.  
  15. Slowly release the tension on the A/C belt tensioner.
  16.  
  17. Remove the ratchet from the A/C belt tensioner.
  18.  
  19. Clean and inspect the belt surfaces of all the pulleys.

    Click image to see an enlarged view

    Fig. Location of air conditioning belt tensioner-4.8L, 5.3L, 6.0L Engine

  20.  

To install:

  1. Install the A/C belt around the crankshaft balancer.
  2.  
  3. Install a ratchet into the A/C drive belt tensioner adapter opening
  4.  
  5. Rotate the A/C belt tensioner clockwise in order to relieve tension on the tensioner.
  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. Install the engine shield.
  18.  
  19. Install the engine shield bolts and tighten to 15 ft. lbs. (20 Nm).
  20.  
  21. Lower the vehicle.
  22.  
  23. Install the accessory drive belt.
  24.  

5.7L & 7.4L Engines
  1. Install a 3 / 8 inch drive wrench on the drive belt tensioner and rotate the arm counterclockwise.
  2.  
  3. Remove the drive belt.
  4.  
  5. Slowly release the tension on the drive belt tensioner.

    Click image to see an enlarged view

    Fig. Location of accessory belt tensioner-5.7L, 7.4L Engine

  6.  

To install:

  1. Route the belt over all the pulleys except the drive belt tensioner.
    NOTE
    Observe belt routing differences for vehicles with and without air conditioning.

  2.  
  3. Install a 3 / 8 inch drive wrench on the drive belt tensioner and rotate the arm counterclockwise.
  4.  
  5. Install the belt over the drive belt tensioner pulley.
  6.  
  7. Slowly release the tension on the drive belt tensioner.
  8.  
  9. Confirm that the belt is properly routed.
  10.  

6.5L Engine
  1. Install a 3 / 8 inch drive wrench on the tensioner arm and rotate the arm counterclockwise.
  2.  
  3. Remove the drive belt from the drive pulleys.
  4.  
  5. Slowly release the tension on the tensioner arm.

    Click image to see an enlarged view

    Fig. Location of accessory belt tensioner-6.5L Engine

  6.  

To install:


NOTE
Refer to the Underhood Label for the proper drive belt routing graphic.

  1. Install the belt over all the pulleys except the tensioner arm
  2.  
  3. Install a 3 / 8 inch drive wrench on the tensioner arm and rotate the arm counterclockwise.
  4.  
  5. Slowly release the tension on the tensioner arm.
  6.  
  7. Confirm that the drive is properly seated in all the pulleys and is properly routed before starting the vehicle.
  8.  

8.1L Engine
Accessory Drive Belt
  1. Install a breaker bar with hex-head socket to the drive belt tensioner bolt.
  2.  
  3. Rotate the drive belt tensioner clockwise in order to relieve tension on the belt.
  4.  
  5. Remove the belt from the pulleys and the drive belt tensioner.
  6.  
  7. Slowly release the tension on the drive belt tensioner.
  8.  
  9. Remove the breaker bar and socket and from the drive belt tensioner bolt.
  10.  
  11. Clean and inspect the belt surfaces of all the pulleys.

    Click image to see an enlarged view

    Fig. Location of accessory belt tensioner-8.1L engine

  12.  

To install:

  1. Route the drive belt around all the pulleys except the idler 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 tensioner.
  6.  
  7. Install the drive belt under the idler 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.  

Air Conditioning Belt
  1. Remove the accessory drive belt.
  2.  
  3. Install a breaker bar into the air conditioning (A/C) belt tensioner adapter opening.
  4.  
  5. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt.
  6.  
  7. Remove the A/C belt from the pulleys.
  8.  
  9. Slowly release the tension on the A/C belt tensioner.
  10.  
  11. Remove the breaker bar from the A/C belt tensioner.
  12.  
  13. Clean and inspect the belt surfaces of all the pulleys.

    Click image to see an enlarged view

    Fig. Location of air conditioning belt tensioner-8.1L Engine

  14.  

To install:

  1. Install the A/C belt around the crankshaft balancer.
  2.  
  3. Install the breaker bar into the A/C drive belt tensioner adapter opening
  4.  
  5. Rotate the A/C belt tensioner clockwise in order to relieve tension on the tensioner.
  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 breaker bar from the A/C belt tensioner.
  14.  
  15. Inspect the A/C belt for proper installation and alignment.
  16.  
  17. Install the accessory drive belt.
  18.  

 
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