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.
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedFACTORY OEM SERVICE PROCEDURE
Component Testing
- Ignition OFF, disconnect the harness connector at the wheel speed sensor.
- Connect a test lamp between B+ and the wheel speed sensor signal circuit terminal A.
- Test for 4-8 mA on the low reading between the low reference terminal A and ground when spinning the wheel very slow.
- If not within the specified range, replace the wheel speed sensor.
- Test for 12-16 mA on the high reading between the low reference terminal A and ground when spinning the wheel very slow.
- If not within the specified range, replace the wheel speed sensor.
Factory Service Tools
Use the Manual With the Right Hardware
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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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