Hummer H2. Manual — part 1440

Fig. 54: APP Assembly
Courtesy of GENERAL MOTORS CORP.

Remove the accelerator pedal mounting bolts.

3. Remove the APP assembly.

Installation Procedure

2004 Hummer H2

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

Fig. 55: APP Assembly
Courtesy of GENERAL MOTORS CORP.

1. Install the APP assembly to the steering column support bracket.

2. Install the accelerator pedal mounting bolts.

Tighten: Tighten the accelerator pedal mounting bolts to 20 N.m (15 lb ft).

NOTE:

Refer to theFastener Notice in Cautions and Notices.

IMPORTANT: Always use a torque wrench in order to obtain the proper torque.

2004 Hummer H2

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

3. Connect the APP sensor harness connector.

4. Verify that the vehicle meets the following conditions:

z

The vehicle is not in a Reduced Engine Power mode.

z

The ignition is ON.

z

The engine is OFF.

5. Connect a scan tool in order to test for a proper throttle-opening and throttle-closing range.

6. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely,

without binding, between a closed throttle, and a wide open throttle (WOT).

7. Inspect the carpet fit under the accelerator pedal.

8. Install the left I/P lower closeout insulator panel.

THROTTLE BODY ASSEMBLY REPLACEMENT

Removal Procedure

2004 Hummer H2

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

Fig. 56: MAF/IAT Sensor & Air Cleaner Assembly
Courtesy of GENERAL MOTORS CORP.

NOTE:

Handle the electronic throttle control components carefully. Use
cleanliness in order to prevent damage. Do not drop the electronic throttle
control components. Do not roughly handle the electronic throttle control
components. Do not immerse the electronic throttle control components in

2004 Hummer H2

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