Chevrolet Silverado / GMC Sierra. Service manual — part 1669

3. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement .

4. Remove the water pump to engine coolant pipe nuts.

5. Remove the engine wiring harness retainer from the inner stud.

Fig. 218: View Of Engine Coolant Pipe & Gasket
Courtesy of GENERAL MOTORS CORP.

6. Remove the water pump bolts. Note the location of the bolts. The bolts are three different

lengths.

7. Remove the water pump.

8. Remove and discard the water pump O-ring and coolant pipe gasket.

9. If required, clean and inspect the water pump. Refer to Water Pump Cleaning and

2008 Chevrolet Silverado 1500

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

Inspection .

Installation Procedure

Fig. 219: View Of Engine Coolant Pipe & Gasket
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the water pump O-ring with engine oil.

2. Install the engine coolant pipe gasket and water pump O-ring.

3. Install the water pump.

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

4. Install the water pump bolts. Ensure the correct length bolt is used in the proper location.

Tighten: Tighten the bolts to 21 N.m (15 lb ft).

Fig. 220: View Of Water Pump Outlet Pipe Nuts
Courtesy of GENERAL MOTORS CORP.

5. Install the engine wiring harness retainer on the water pump outlet pipe inner stud.

6. Install the water pump to engine coolant pipe nuts.

Tighten: Tighten the nuts to 21 N.m (15 lb ft).

2008 Chevrolet Silverado 1500

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

7. Install the thermostat housing crossover. Refer to Thermostat Housing Crossover

Replacement (LMM).

8. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement .

9. Install the left wheelhouse inner panel. Refer to Front Wheelhouse Liner Replacement -

Left Side (Chevrolet) or Front Wheelhouse Liner Replacement - Left Side (GMC) .

ENGINE COOLANT FAN UPPER SHROUD REPLACEMENT (MECHANICAL)

Removal Procedure

Fig. 221: View Of Throttle Body Heater Hose & Retainers
Courtesy of GENERAL MOTORS CORP.

1. Loosen the air cleaner outlet duct clamps from the throttle body.

2008 Chevrolet Silverado 1500

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