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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 526 (ANTILOCK BRAKE SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC C0035 OR C0040CIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Circuit/System Testing
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the EBCM.
- Ignition ON, test for less than 1 volt between the wheel speed sensor low reference circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 16
- RF Sensor circuit terminal 27
- If greater than the specified range, test the low reference circuit for a short to voltage.
- Test for less than 1 volt between the signal circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 15
- RF Sensor circuit terminal 26
- If greater than the specified range, test the signal circuit for a short to voltage.
- Ignition OFF, test for infinite resistance between the signal circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 15
- RF Sensor circuit terminal 26
- If less than the specified value, test the signal circuit for a short to ground.
- Test for infinite resistance between the following low reference circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 16
- RF Sensor circuit terminal 27
- If less than the specified value, test the signal circuit for a short to ground.
- Ignition OFF, disconnect the harness connector at the appropriate WSS.
- Ignition OFF, test for less than 2 ohms between the appropriate signal circuit terminals listed below.
- LF Sensor signal circuit terminal 15 at the EBCM harness connector, and terminal B at the WSS harness connector
- RF Sensor signal circuit terminal 26 at the EBCM harness connector, and terminal B at the WSS harness connector
- If greater than the specified range, test the signal circuit for an open or high resistance.
- Test for less than 2 ohms between the appropriate low reference circuit terminals listed below.
- LF Sensor low reference circuit terminal 16 at the EBCM harness connector, and terminal A at the WSS harness connector
- RF Sensor low reference circuit terminal 27 at the EBCM harness connector, and terminal A at the WSS harness connector
- If greater than the specified range, test the low reference circuit for an open or high resistance.
- If all circuits test normal, replace the appropriate wheel speed sensor. If the DTC resets replace the EBCM.
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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.