Chevrolet Silverado / GMC Sierra. Service manual — part 1677

11. Remove the coolant heater from the engine block.

12. Remove any burrs, sealer, or other rough spots.

Installation Procedure

Fig. 249: Locating Coolant Heater

2008 Chevrolet Silverado 1500

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

Courtesy of GENERAL MOTORS CORP.

1. If reusing the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N

10953480), or equivalent to the threads.

2. Install the coolant heater to the engine block.

Tighten: Tighten the coolant heater to 50 N.m (37 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Fig. 250: View Of Coolant Heater Cord
Courtesy of GENERAL MOTORS CORP.

3. Connect the coolant heater cord electrical connector.

Fig. 251: Locating Oil Cooler Hose Bracket & Adapter Bolts
Courtesy of GENERAL MOTORS CORP.

4. For vehicles with RPO LY6 (6.0L) perform the following steps otherwise proceed to step 9.

5. Position the oil cooler hose adapter end.

6. Install a NEW oil cooler hose adapter gasket.

7. Install the oil cooler hose adapter bolts (2).

Tighten: Tighten the bolts to 12 N.m (106 lb in).

8. Install the oil cooler hose bracket bolt (1).

2008 Chevrolet Silverado 1500

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

Tighten: Tighten the bolt to 25 N.m (18 lb ft).

Fig. 252: View Of Oil Pan Skid Plate & Bolts
Courtesy of GENERAL MOTORS CORP.

9. For 2500 series vehicles, position the oil pan skid plate and install the 2 front bolts and

tighten the 2 rear bolts, if equipped.

Tighten: Tighten the bolts to 20 N.m (15 lb ft).

2008 Chevrolet Silverado 1500

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