Hummer H2. Manual — part 1432

Fig. 30: PCM & Engine Compartment
Courtesy of GENERAL MOTORS CORP.

1. Install the PCM to the PCM mounting bracket ensuring that the mounting tabs are engaged.

2. Secure the spring latch to the PCM.

2004 Hummer H2

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 31: PCM Harness Connectors
Courtesy of GENERAL MOTORS CORP.

3. Connect the PCM connectors to the PCM.

Tighten: Tighten the PCM connector end fasteners to 8 N.m (71 lb in).

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 32: PCM Cover
Courtesy of GENERAL MOTORS CORP.

4. Install the PCM cover to the PCM mounting bracket, ensuring the mounting tabs on the PCM mounting

bracket are engaged into the mounting holes in the PCM cover.

5. If a new PCM is being installed, program the PCM. Refer to Service Programming System (SPS) in

Programming.

THROTTLE ACTUATOR CONTROL (TAC) MODULE REPLACEMENT

Removal Procedure

2004 Hummer H2

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 33: TAC Module Electrical Connectors
Courtesy of GENERAL MOTORS CORP.

1. Remove the left hand corner brace from the cowl.

2. Remove the TAC module mounting nuts.

3. Disconnect the TAC module electrical connectors from the TAC module.

Installation Procedure

2004 Hummer H2

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2