Chevrolet Silverado / GMC Sierra. Service manual — part 1077

Piece Propeller Shaft Replacement .

5. Remove the drain pan and lower the vehicle.

6. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to

Transmission Fluid Check.

CASE EXTENSION ASSEMBLY REPLACEMENT

Removal Procedure

Fig. 198: View Of Case Extension, Bolts & O-Ring Seal
Courtesy of GENERAL MOTORS CORP.

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

2. Support the transmission with a transmission jack.

3. Place a drain pan under the vehicle.

4. Remove the propeller shaft. Refer to One-Piece Propeller Shaft Replacement or Two-

Piece Propeller Shaft Replacement .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

5. Remove the transmission mount. Refer to Transmission Mount Replacement (2WD) or

Transmission Mount Replacement (4WD).

6. Remove the case extension bolts (1).

7. Remove the case extension (2).

8. Remove and discard the case extension O ring seal (3).

Installation Procedure

Fig. 199: View Of Case Extension, Bolts & O-Ring Seal
Courtesy of GENERAL MOTORS CORP.

1. Install a new case extension O ring seal (3).

2. Install the case extension (2).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

3. Install the case extension bolts (1).

Tighten: Tighten the bolts (1) to 45 N.m (33 lb ft).

4. Install the transmission mount. Refer to Transmission Mount Replacement (2WD) or

Transmission Mount Replacement (4WD).

5. Install the propeller shaft. Refer to One-Piece Propeller Shaft Replacement or Two-

Piece Propeller Shaft Replacement .

6. Remove the drain pan and the transmission jack.

7. Lower the vehicle.

8. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to

Transmission Fluid Check.

VEHICLE SPEED SENSOR REPLACEMENT

Removal Procedure

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Fig. 200: View Of Transmission Harness 20-Way Connector & VSS Electrical
Connector
Courtesy of GENERAL MOTORS CORP.

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

2. Disconnect the vehicle speed sensor (VSS) electrical connector (2).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado