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.
2009 Hummer H3 V8-5.3LFACTORY OEM SERVICE PROCEDURE
Accelerator Pedal Position Sensor: Service and Repair
Accelerator Pedal Position Sensor Replacement
Removal Procedure
1. Remove the knee bolster bracket. Refer to Driver Knee Bolster Bracket Replacement (Right Hand Drive) (Service and Repair)Driver Knee Bolster Bracket Replacement (Left Hand Drive) (Driver Knee Bolster Bracket Replacement).
2. Disconnect the body wiring harness electrical connector from the accelerator pedal position (APP) sensor.
3. Remove the accelerator pedal/APP sensor nuts.
4. Remove the accelerator pedal/APP sensor from the vehicle.
Installation Procedure
1. Install the accelerator pedal/APP sensor over the studs.
Caution: Refer to Fastener Caution (Fastener Caution).
2. Install the accelerator pedal/APP sensor nuts.
Tighten the nuts to 9 Nm (80 lb in).
3. Connect the body wiring harness electrical connector to the APP sensor.
4. Inspect below the pedal for binding, to ensure full range of motion.
5. Install the knee bolster bracket. Refer to Driver Knee Bolster Bracket Replacement (Right Hand Drive) (Service and Repair)Driver Knee Bolster Bracket Replacement (Left Hand Drive) (Driver Knee Bolster Bracket Replacement).
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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