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

Mechanical (Belt Driven) Fan

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Removal & Installation




CAUTION
Do not use or attempt to repair a damaged cooling fan assembly. Replace damaged fans with new assemblies. An unbalanced cooling fan could fly apart causing personal injury and property damage.

  1. Remove the upper fan shroud.
  2.  
  3. Remove the fan and the clutch assembly
  4.  
  5. Remove the fan blade from the clutch.
  6.  

To install:

  1. Install the fan blade to the clutch.
  2.  
  3. Tighten the bolts to 17 ft. lbs. (23 Nm).
  4.  
  5. Install the fan and clutch assembly.
  6.  
  7. Tighten the fan clutch nut to 41 ft. lbs. (56 Nm).
  8.  
  9. Install the upper fan shroud.
  10.  

7.4L Engine And All Diesel Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the radiator shroud.
  4.  
  5. Locate the yellow dot on the fan clutch hub and matchmark the water pump pulley.
  6.  
  7. Remove the drive belt, if necessary.
  8.  
  9. Remove the fan clutch-to-water pump pulley nuts and lift out the fan/clutch assembly.
  10.  
  11. Remove the fan clutch bolts and separate the fan from the clutch.
  12.  

To install:

  1. Install the fan on the fan clutch and tighten the bolts to 18 ft. lbs. (24 Nm).
  2.  
  3. Position the fan/clutch assembly on the water pump pulley so that the reference marks on each hub align. Tighten the nuts to 18 ft. lbs. (24 Nm).
  4.  
  5. Install the fan shroud.
  6.  
  7. Connect the battery cable.
  8.  

Except 7.4L And Diesel
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the radiator fan shroud.
  4.  
  5. Remove the drive belt, if necessary.
  6.  
  7. Remove the four fan clutch-to-water pump pulley nuts and lift out the fan/clutch assembly.

    Click image to see an enlarged view

    Fig. Engine fan and clutch assembly-gasoline engines



    Click image to see an enlarged view

    Fig. Remove the four fan clutch-to-water pump pulley nuts and lift out the fan/clutch assembly

  8.  
  9. Remove the fan clutch bolts and separate the fan from the clutch.
  10.  

To install:

  1. Install the fan on the fan clutch and tighten the bolts to 17 ft. lbs. (23 Nm).
  2.  
  3. Position the fan/clutch assembly on the water pump pulley. Tighten the nuts to 18 ft. lbs. (24 Nm).
  4.  
  5. Install the fan shroud.
  6.  
  7. Connect the battery cable.

    Click image to see an enlarged view

    Fig. Engine fan and clutch assembly-diesel engines

  8.  

 
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