GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1997 🢒 Sonoma Pickup - 2WD 🢒 Engine 🢒 Engine Cooling 🢒 Fan Clutch Replacement

Removal Procedure

    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. Refer to Fan Shroud Replacement .

    2. Object Number: 42910 Size: SH
  2. Remove the fan clutch to the coolant pump drive pulley attaching nuts using J-41240 fan clutch wrench.
  3. Separate the fan clutch assembly from the coolant pump drive pulley.
  4. Remove the fan and the fan clutch as an assembly.

    5. Object Number: 42875 Size: SH
  5. Remove the fan-to-fan clutch mounting screws (2.2L w/o AC).

    6. Object Number: 42877 Size: SH
  6. Remove the fan to fan clutch mounting screws (4.3L all and 2.2L w/AC).
  7. Remove the fan from the clutch.

Installation Procedure

    Object Number: 42875 Size: SH
  1. Install the fan to the fan clutch mounting (2.2L w/o AC).

    2. Object Number: 42877 Size: SH
  2. Install the fan to the fan clutch mounting (4.3L all and 2.2L w/AC).
  3. Install the upper fan shroud. Refer to Fan Shroud Replacement .

    4. Object Number: 42910 Size: SH
  4. Install the fan clutch to the coolant pump pulley using the J-41240 fan clutch wrench.
  5. Install the attaching nuts.
  6. Attach the fan to the clutch with the attaching screws.

    7. Tighten
    Tighten the screws to 33 N·m (24 lb ft).

  7. Refer to General Information.

    8. Important: To maintain a balanced fan assembly, align the yellow paint mark on the fan clutch hub with the yellow paint mark on the water pump hub.

    Tighten
    Tighten the nuts to 24 N·m (17 lb ft).