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 G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1334 (THEFT DETERRENT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESINTRUSION SENSOR INOPERATIVECIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Circuit/System Testing
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the intrusion sensor.
- Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition OFF, disconnect the X2 harness connector at the RIM.
- Ignition ON, test for less than 1 volt between the following signal circuit terminals and ground:
- Signal circuit terminal 11
- Signal circuit terminal 20
- If greater than the specified range, test the signal circuit for a short to ground.
- Test for infinite resistance between the following signal circuit terminals and ground:
- Signal circuit terminal 11
- Signal circuit terminal 20
- If less than the specified value, test the signal circuit for a short to ground.
- Test for less than 2 ohms of resistance between the signal circuit terminal 11 at the RIM and the signal circuit terminal C at the inclination sensor.
- If greater than the specified range, test the signal circuit for an open/high resistance.
- Test for less than 2 ohms of resistance between the signal circuit terminal 20 at the RIM and the signal circuit terminal B at the inclination sensor.
- If greater than the specified range, test the signal circuit for an open/high resistance.
- If all circuits test normal, test or replace the intrusion sensor.
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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.