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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1233 (ADJUSTABLE PEDAL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESADJUSTABLE PEDALS INOPERATIVE (WITH MEMORY)CIRCUIT/SYSTEM TESTING
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Circuit/System Testing
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Adjustable Pedal Switch Circuit Test
- Disconnect the adjustable pedal switch connector and verify that neither of the adjuster switch inputs are displayed as Active.
- If either of the switch inputs are displayed as Active, test the affected switch signal circuit for a short to voltage. If the circuit tests normal replace the MSM.
- Verify that battery voltage is present at the reference voltage circuit terminal 5.
- If battery voltage is not present, test the reference voltage circuit for an open/high resistance. If the circuit tests normal replace the MSM.
- Connect a fused jumper wire from the reference voltage circuit terminal 5 to each of the switch signal circuit terminals 4 and 6, and verify that the switch inputs are displayed as Active when connected.
- If the switch inputs are not Active with the jumper wire connected, test the affected switch signal circuit for an open/high resistance. If the circuit tests normal replace the MSM.
- If the circuits test normal replace the adjustable pedal switch.
Motor Control Circuit Test
- Disconnect the MSM connector C3.
- Verify that a test lamp illuminates when connected from the high current battery supply circuit terminal 5 to ground.
- If the test lamp does not illuminate, repair the high current battery supply circuit for an open or short to ground.
- Connect the MSM connector C3 and disconnect the adjustable pedal motor connector.
- Ignition on, verify that approximately 2 volts are present at the motor control circuit terminals.
- If 2 volts are not present, repair the affected motor control circuit for an open/high resistance. If the circuits test normal replace the MSM.
- If the circuits test normal replace the brake pedal assembly.
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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.