Chevrolet Silverado / GMC Sierra. Manual

Fig. 127: View Of EGR Cooler Pipe Nut
Courtesy of GENERAL MOTORS CORP.

5. Install the upper EGR cooler pipe nut (1).

Tighten: Tighten the bolt to 9 N.m (80 lb in).

2008 Chevrolet Silverado 1500

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

Fig. 128: View Of EGR Cooler Pipe Clamp
Courtesy of GENERAL MOTORS CORP.

6. Install the EGR cooler pipe hose to the EGR cooler tube and reposition the EGR cooler

pipe clamp (1).

7. Fill the cooling system. Refer to Cooling System Draining and Filling (Vac-N-Fill) or

Cooling System Draining and Filling (Static Fill).

WATER OUTLET TUBE REPLACEMENT (LMM)

Removal Procedure

2008 Chevrolet Silverado 1500

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

Fig. 129: View Of Wiring Harness Bracket & Bolts
Courtesy of GENERAL MOTORS CORP.

1. Remove the radiator inlet hose. Refer to Radiator Inlet Hose Replacement (Non-HP2).

2. Remove the turbocharger coolant bypass valve. Refer to Turbocharger Coolant Bypass

Valve Replacement.

3. Remove the bolts and wiring harness bracket at the thermostat housing.

4. Position the bracket and wiring harness aside.

2008 Chevrolet Silverado 1500

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

Fig. 130: View Of Main Engine Electrical Harness Connector Latches & Clips
Courtesy of GENERAL MOTORS CORP.

5. Disconnect the main engine electrical harness connectors. Lift up on the latches (1) in order

to disconnect the connectors.

6. Open the harness clip (2).

7. Remove the main engine electrical harness connectors.

2008 Chevrolet Silverado 1500

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

Chevrolet Silverado / GMC Sierra. Manual - part 1646