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 harness connector at the yaw rate/lateral accelerometer.
Test for less than 2 ohms between the ground circuit terminal 6 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, test for 11.8-12.2 volts between the 12-volt reference circuit terminal 1 and ground.
- If less than the specified range, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
Test for 5.5-7.0 volts between the CAN circuit terminal 3 and ground.
- If greater than the specified range, test the CAN circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
- If less than the specified range, test the CAN circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
Test for 5.5-7.0 volts between the CAN circuit terminal 2 and ground.
- If greater than the specified range, test the CAN circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
- If less than the specified range, test the CAN circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
Test for infinite ohm of resistance between the CAN circuit High, and Low terminals 2 and 3.
- If less than the specified range, test the CAN circuits for a shorted to each other. If the circuit tests normal, replace the EBCM.
If all circuits test normal, test or replace the yaw rate/lateral accelerometer sensor.

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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