Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE
Accelerator Pedal Position Sensor: Service and Repair
ACCELERATOR PEDAL POSITION (APP) SENSOR REPLACEMENT
REMOVAL PROCEDURE
1. Remove the left instrument panel (I/P) lower closeout insulator panel.
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 cleaning solvents of any type.
2. Disconnect the accelerator pedal position (APP) sensor harness connector.
Remove the accelerator pedal mounting bolts.
3. Remove the APP assembly.
INSTALLATION PROCEDURE
1. Install the APP assembly to the steering column support bracket.
2. Install the accelerator pedal mounting bolts.
NOTE: Refer to the Fastener Notice in Service Precautions.
IMPORTANT: Always use a torque wrench in order to obtain the proper torque.
Tighten the accelerator pedal mounting bolts to 20 N.m (15 lb ft).
3. Connect the APP sensor harness connector.
4. Verify that the vehicle meets the following conditions:
- The vehicle is not in a Reduced Engine Power mode.
- The ignition is ON.
- 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.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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