Chevrolet Silverado / GMC Sierra. Service manual — part 1633

Fig. 78: Identifying Fan Shroud Mounting Brackets & Bolts
Courtesy 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 fan shroud. Refer to Engine Coolant Fan Upper Shroud Replacement

(Mechanical) or Engine Coolant Fan Upper Shroud Replacement (Automatic
Transmission - Diesel).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

COOLING FAN PULLEY REPLACEMENT

Removal Procedure

Fig. 79: View Of Camshaft Position Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.

1. Remove the drive belt. Refer to Drive Belt Replacement .

2. Remove the fan clutch. Refer to Fan Clutch Replacement (Diesel).

3. Disconnect the camshaft position (CMP) sensor electrical connector.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 80: View Of Cooling Fan Pulley
Courtesy of GENERAL MOTORS CORP.

4. Remove the fan pulley bolts/nuts.

5. Remove the fan pulley.

Installation Procedure

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 81: View Of Cooling Fan Pulley
Courtesy of GENERAL MOTORS CORP.

1. Install the fan pulley.

2. Install the fan pulley bolts/nuts.

Tighten: Tighten the bolts/nuts to 41 N.m (30 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado