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.
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HOMESERVICE MANUALSCHEVROLET2012EXPRESS 2500 V8-4.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSACCELERATOR PEDAL POSITION SENSORSERVICE AND REPAIR
2012 Chevrolet Express 2500 V8-4.8L
Accelerator Pedal Position Sensor: Service and Repair
2012 Chevrolet Express 2500 V8-4.8LSECTION Service and Repair
Accelerator Pedal Position Sensor Replacement
Removal Procedure
Caution:
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.
1. Remove the connector position assurance (CPA) retainer.
2. Disconnect the accelerator pedal position (APP) sensor electrical connector.
3. Reposition the carpet to access the lower nut.
4. Remove the accelerator pedal nuts.
5. Remove the accelerator pedal assembly.
Installation Procedure
1. Install the accelerator pedal assembly.
Caution:
Refer to Fastener Caution Fastener Caution.
2. Install the accelerator pedal nuts and tighten to 20 Nm (15 lb ft).
3. Connect the APP sensor electrical connector.
4. Reposition the carpet.
5. Connect a scan tool in order to test for 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. 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.
8. Inspect the carpet fit under the accelerator pedal.
RENDER: 1.0x
NO RELATED
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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.