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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 972 (Engine Cooling System) >> Repair Instructions >> Fan Clutch Replacement (Diesel) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
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.
    Fig 1: View Of Fan Blade & Fan Clutch
    GM721992Courtesy of GENERAL MOTORS CORP.
  1. Install the fan clutch onto the fan blade.
    2. NOTE: Refer to Fastener Notice .
  2. Install the fan clutch bolts.

    Tighten:  Tighten the bolts to 23 N.m (17 lb ft).

  3. Install the fan and engine cooling fan shroud assembly to the fan hub.
    4. Fig 2: View Of Fan Clutch Hub & Nut
    GM1674552Courtesy of GENERAL MOTORS CORP.
  4. Use a J 41240-5A  on the fan clutch hub nut (2) to install a long pry bar to the fan clutch hub (1).

    Tighten:  Tighten the nut clockwise to 56 N.m (41 lb ft).

    5. Fig 3: Identifying Fan Shroud Mounting Brackets & Bolts
    GM1674565Courtesy of GENERAL MOTORS CORP.
  5. Position the engine cooling fan shroud on the 3 mounting brackets (1).
  6. Install the bolts. Loosely tighten the top mounting bolt at the oil filler neck.
    7. Fig 4: View Of Cooling Fan Shroud
    GM1674558Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Maintain a 6 mm (0.25 in) minimum clearance at all 3 places.
  7. Center the engine cooling fan shroud to the fan blade in 3 places (1).
    8. Fig 5: Cooling Fan Shroud And Rubber Seal
    GM1989946Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Improper installation could cause damage to the fan and shroud while vehicle is in service.
  8. Make sure the orientation of the cooling fan shroud (1) and rubber seal (2) are installed correctly
    9. Fig 6: Identifying Fan Shroud Mounting Brackets & Bolts
    GM1674565Courtesy of GENERAL MOTORS CORP.
  9. Fully tighten the 3 engine cooling fan shroud bolts (1).

    Tighten:  Tighten the bolts to 8 N.m (71 lb in).

  10. Install the upper fanEngine Coolant Fan Upper Shroud Replacement (Mechanical)  or Engine Coolant Fan Upper Shroud Replacement (Automatic Transmission - Diesel) .
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