Chevrolet Silverado / GMC Sierra. Service manual — part 2807

Fig. 4: View Of Transfer Case Fill Plug
Courtesy of GENERAL MOTORS CORP.

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield

Replacement.

3. Remove the fill plug.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 5: View Of Transfer Case Drain Plug
Courtesy of GENERAL MOTORS CORP.

4. Remove the drain plug.

5. Allow the transfer case to drain completely.

Installation Procedure

IMPORTANT: Ensure that an approved drain pan is used when draining the

transfer case.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 6: View Of Transfer Case Drain Plug
Courtesy of GENERAL MOTORS CORP.

1. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of

the drain and fill plugs.

2. Install the drain plug.

IMPORTANT: Use only drain and fill plugs that are made from aluminum.

Steel or brass plugs are not compatible with the magnesium
case.

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

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

3. Fill the transfer case to the bottom of the fill plug hole with the recommended fluid. Refer

to Sealers, Adhesives, and Lubricants.

Fig. 7: View Of Transfer Case Fill Plug
Courtesy of GENERAL MOTORS CORP.

4. Install the fill plug.

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

5. Install the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement.

6. Lower the vehicle.

TRANSFER CASE SPEED SENSOR REPLACEMENT

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado