Hummer H2. Manual - part 2637

Fig. 76: Disconnecting VSS Electrical Connector
Courtesy of GENERAL MOTORS CORP.

Installation

1. Install NEW VSS with a NEW "O" ring seal into the transfer case.

2. Connect the VSS electrical connector (2). See Fig. 76 .

2004 Hummer H2

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

3. Lower the vehicle.

4. Refill the fluid as required. See LUBRICATION .

2-4 SERVO

Removal

1. Raise the vehicle. Drain the transmission fluid. See DRAINING & REFILLING .

2. Remove frame-to-engine protection shield bolts. See Fig. 35 . Remove engine protection shield. Remove

the catalytic converter guard mounting bolts and guard from vehicle. See Fig. 36 .

3. Disconnect the connector position assurance (CPA) retainers. Disconnect the oxygen sensor electrical

connectors (1, 2). See Fig. 37 .

4. Remove the catalytic converter to muffler flange nuts. Remove the exhaust manifold pipe-to-catalytic

converter nuts. Remove the catalytic converter.

5. Remove the heat shield bolts. See Fig. 38 . Remove the heat shield.

6. Install the servo cover depressor. See Fig. 77 .

7. Tighten the bolt on servo cover depressor in order to compress the servo cover.

8. Remove the servo cover ring. See Fig. 78 .

9. Remove the servo cover depressor.

10. Remove the servo cover and "O" ring seal. If the cover is hung up on the seal, use a pick (2) in order to

pull and stretch the seal (1) out of the groove. Cut and remove the "O" ring seal before removing the
cover. See Fig. 79 .

11. Remove the 2-4 servo. See Fig. 80 .

12. Inspect the 4th apply piston, 2-4 servo converter, 2nd apply piston, and the servo piston inner housing for

the following defects:

Cracks.

Scoring.

Burrs and nicks.

NOTE:

Tools required: Servo Cover Depressor (J-29714-A).

2004 Hummer H2

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2