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 G2500, Van Cargo Extended, 6.0 KFACTORY OEM SERVICE PROCEDURE
Circuit/System Testing
- Ignition OFF, disconnect the EBCM harness connector and connect a test lamp between the battery positive voltage circuit terminal going to the ABS pump motor, and to ground.
- Ignition ON, verify that the test lamp illuminates.
- If the test lamp does not illuminate, repair the open or high resistance in the battery positive voltage circuit.
- Connect a test lamp between the battery positive voltage circuit and pump motor ground circuit at the EBCM connector, verify that the test lamp illuminates.
- If the test lamp does not illuminate, repair the open or high resistance in the pump motor ground circuit.
- Ignition OFF, remove the EBCM from the BPMV.
- Inspect the EBCM to BPMV connector for conditions such as damage, corrosion, or presence of brake fluid.
- If connector corrosion or damage is evident, replace BPMV and/or EBCM as necessary.
- If brake fluid is present, replace both BPMV and EBCM.
- Connect the EBCM harness to the EBCM with the BPMV still separated.
- Connect a test lamp between the pump motor circuits, internal EBCM side.
- Ignition ON, use the scan tool to perform the Pump Motor Test refer to Brake Pressure Modulator Valve Hydraulic Testing .
- If test lamp illuminates replace the BPMV.
- If test lamp does not illuminate replace the EBCM.
Factory Service Tools
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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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