Chevrolet Silverado / GMC Sierra. Service manual — part 2601

Fig. 23: Identifying VSS And O-Ring Seal
Courtesy of GENERAL MOTORS CORP.

1. Coat a NEW O-ring seal with a thin film of Synchro-mesh transmission fluid GM P/N

12345349 (Canadian P/N 10953465), or equivalent.

2. Install the VSS and O-ring seal.

Tighten: Tighten the VSS to 16 N.m (12 lb ft).

NOTE:

Refer to Component Fastener Tightening Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Manual Transmission - Tremec 5-Speed (TZ0)

Fig. 24: Locating HO2S Electrical Connector At Harness (Manual 2WD)
Courtesy of GENERAL MOTORS CORP.

3. Connect the VSS electrical connector (1).

4. Lower the vehicle.

TRANSMISSION FLUID REPLACEMENT

Tools Required

J 36511 Oil Fill/Drain Plug Hex Bit (17 mm)

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Manual Transmission - Tremec 5-Speed (TZ0)

Removal Procedure

Fig. 25: View Of Oil Fill Plug
Courtesy of GENERAL MOTORS CORP.

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

2. Using J 36511 remove the oil fill plug.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Manual Transmission - Tremec 5-Speed (TZ0)

Fig. 26: View Of Oil Drain Plug
Courtesy of GENERAL MOTORS CORP.

3. Place a suitable drain pan under the transmission in order to catch the drained transmission

fluid.

4. Using J 36511 remove the oil drain plug.

5. Remove any old sealant from the transmission housing.

Installation Procedure

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Manual Transmission - Tremec 5-Speed (TZ0)