Avalanche, Sierra, Silverado, C&K Series, 1999-2005

Accessory Drive Belts 2

Imprimir

Drive Belt Routings





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Fig. Accessory serpentine belt routing-8.1L engines



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Fig. Accessory serpentine belt routing-4.3L engines



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Fig. Accessory serpentine belt routing-4.8L, 5.3L, 6.0L and 6.2L engines



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Fig. Accessory serpentine belt routing-6.6L engines



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Fig. Accessory serpentine belt routing-8.1L engines

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



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



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



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    Fig. Accessory serpentine belt routing-6.5L Diesel engines



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    Fig. Accessory serpentine belt routing-6.6L Diesel engines



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    Fig. Accessory serpentine belt routing-7.4L engine



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    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. 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.
  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. 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.
  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 throttl