Cooling Fan and Shroud Replacement LS3, LS7

Warning: An electric fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.

Warning: To help avoid personal injury or damage to the vehicle, a bent, cracked, or damaged fan blade or housing should always be replaced.

Warning: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Remove the radiator support. Refer to Radiator Support Replacement
2. Disconnect the engine wiring harness from the cooling fan shroud.
3. Disconnect the surge tank outlet hose from the retaining clips on the cooling fan shroud and position aside.
4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
5. Remove the stabilizer shaft. Refer to Stabilizer Shaft Replacement



6. Disconnect the cooling fan electrical connector.
7. Vehicles equipped with transmission fluid cooler, disconnect the lower transmission oil cooler line from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connectionfor the 6L80-E transmission or Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connectionfor the Tremec 6-Speed transmission.
8. Vehicles equipped with an engine oil cooler, disconnect the upper and lower engine oil cooler pipes. Refer to Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement



9. Remove the cooling fan shroud retaining bolts.
10. Remove the cooling fan and shroud.

Note: Ensure the cooling fan and shroud is properly seated on the radiator

1. Install the cooling fan and shroud.

Caution: Refer to Fastener Caution in the Preface section.




2. Install the cooling fan shroud retaining bolts. 9 N·m (80 lb in)
3. Vehicles equipped with transmission fluid cooler, connect the lower transmission oil cooler line from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connectionfor the 6L80-E transmission or Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connectionfor the Tremec 6-Speed transmission.
4. Vehicles equipped with an engine oil cooler, connect the upper and lower engine oil cooler pipes. Refer to Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement



5. Connect the cooling fan electrical connector.
6. Install the stabilizer shaft. Refer to Stabilizer Shaft Replacement
7. Lower the vehicle.
8. Connect the surge tank outlet hose to the retaining clips on the cooling fan shroud.
9. Connect the engine wiring harness to the cooling fan shroud.
10. Install the radiator support. Refer to Radiator Support Replacement

Cooling Fan and Shroud Replacement LS9

Warning: An electric fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.

Warning: To help avoid personal injury or damage to the vehicle, a bent, cracked, or damaged fan blade or housing should always be replaced.

Warning: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Remove the radiator support. Refer to Radiator Support Replacement
2. Disconnect the engine wiring harness from the cooling fan shroud.
3. Disconnect the surge tank outlet hose from the retaining clips on the cooling fan shroud and position aside.
4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
5. Remove the stabilizer shaft. Refer to Stabilizer Shaft Replacement



6. Disconnect the cooling fan electrical connector.
7. Vehicles equipped with transmission fluid cooler, disconnect the lower transmission oil cooler line from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connectionfor the 6L80-E transmission or Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connectionfor the Tremec 6-Speed transmission.
8. Vehicles equipped with an engine oil cooler, disconnect the upper and lower engine oil cooler pipes. Refer to Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement



9. Remove the cooling fan shroud retaining bolts (1).
10. Remove the cooling fan and shroud (2).

Note: Ensure the cooling fan and shroud is properly seated on the radiator

1. Install the cooling fan and shroud (2).

Caution: Refer to Fastener Caution in the Preface section.




2. Install the cooling fan shroud retaining bolts (1). 9 N·m (80 lb in)
3. Vehicles equipped with transmission fluid cooler, connect the lower transmission oil cooler line from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connectionfor the 6L80-E transmission or Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connectionfor the Tremec 6-Speed transmission.
4. Vehicles equipped with an engine oil cooler, connect the upper and lower engine oil cooler pipes. Refer to Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement



5. Connect the cooling fan electrical connector.
6. Install the stabilizer shaft. Refer to Stabilizer Shaft Replacement
7. Lower the vehicle.
8. Connect the surge tank outlet hose to the retaining clips on the cooling fan shroud.
9. Connect the engine wiring harness to the cooling fan shroud.
10. Install the radiator support. Refer to Radiator Support Replacement