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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1017 (ADJUSTABLE PEDAL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESADJUSTABLE PEDALS INOPERATIVE (W/O MEMORY)CIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Circuit/System Testing
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the left instrument panel (I/P) junction block connector C2.
- Verify that a test lamp illuminates when connected from the park enable relay supply circuit terminal E2 in the harness connector to ground.
- If the test lamp does not illuminate repair the park enable relay supply circuit for an open or short to ground. If the circuit tests normal and the EAP fuse #73 is open, test the following circuits for a short to ground:
- Switch supply circuit
- Switch signal circuits
- Motor control circuits
- If the test lamp does not illuminate repair the park enable relay supply circuit for an open or short to ground. If the circuit tests normal and the EAP fuse #73 is open, test the following circuits for a short to ground:
- Disconnect the left I/P junction block connector C1.
- Connect a DMM from the adjustable pedal switch supply circuit terminal C4 to the forward switch signal circuit in connector C2 terminal G1.
- Verify less than 1 ohm of resistance while pressing the adjustable pedal forward switch.
- If greater than 1 ohm of resistance test the switch supply and signal circuits for an open or high resistance. If the circuits test normal replace the adjustable pedal switch.
- Connect a DMM from the adjustable pedal switch supply circuit terminal C4 to the rearward switch signal circuit in connector C2 terminal E1.
- Verify less than 1 ohm of resistance while pressing the adjustable pedal rearward switch.
- If greater than 1 ohm of resistance test the switch signal circuit for an open or high resistance. If the circuit tests normal replace the adjustable pedal switch.
- Connect the I/P junction block connectors.
- Disconnect the adjustable pedal motor connector and connect a test lamp across the control circuit terminals in the harness connector.
- Verify that the test lamp illuminates when the adjustable pedal switch is pressed in both directions.
- If the test lamp does not illuminate while the switch is pressed in both directions, test the control circuits for an open or high resistance. If the control circuits test normal replace the left I/P junction block.
- If the circuit tests are normal replace the adjustable pedal motor.
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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.