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 1331 (OBJECT DETECTION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSIDE OBJECT SENSOR MALFUNCTIONCIRCUIT/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.
One or Both SOD Indicators Inoperative
- Ignition OFF, disconnect the harness connector at the left and right side SOD sensor.
- Test for less than 1.0 ohm of resistance between the following ground circuit terminals and ground.
- Terminal 5 (Left SOD Sensor)
- Terminal 6 (Left SOD Sensor)
- Terminal 5 (Right SOD Sensor)
- If greater than 1.0 ohm, test the appropriate ground circuit for a short to voltage or an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the following B+ circuit terminals and ground.
- Terminal 2 (Left SOD Sensor)
- Terminal 2 (Right SOD Sensor)
- If the test lamp does not illuminate, test the appropriate B+ circuit for a short to ground or an open/high resistance.
- Ignition OFF, disconnect the X3 and X4 harness connector at the left and right front door modules.
- Test for less than 1.0 ohm of resistance between the following SOD indicator ground circuit terminals and ground.
- X4 Terminal 7 (Left Door Module)
- X4 Terminal 7 (Right Door Module)
- If greater than 1.0 ohm, test the appropriate ground circuit for a short to voltage or an open/high resistance.
- Ignition OFF, test for greater than 1.0 ohm of resistance between the following SOD indicator signal circuit terminals and ground.
- X3 Terminal 4 (Left Door Module)
- X3 Terminal 4 (Right Door Module)
- If less than 1.0 ohm, test the appropriate signal circuit for a short to ground.
- Ignition ON, verify that a test lamp does not illuminate between the SOD indicator signal circuit terminals and ground.
- If the test lamp illuminates, test the signal circuit for a short to voltage.
- Ignition OFF, disconnect the harness connector at the left and right outside rear view mirrors.
- Test for less than 1.0 ohm of resistance along the SOD indicator signal circuit terminals and the outside rear view mirror terminals.
- If greater than 1.0 ohm, test the signal circuit for an open/high resistance. If the circuit(s) test normal, replace the appropriate side rear view mirror.
- If all circuits test normal, replace the appropriate door module.
SOD Indicators Stay On After Self Test
- Ignition OFF, disconnect the harness connector at the left and right side SOD sensor.
- Test for less than 1.0 ohm of resistance between the following ground circuit terminals and ground.
- Terminal 5 (Left SOD Sensor)
- Terminal 6 (Left SOD Sensor)
- Terminal 5 (Right SOD Sensor)
- If greater than 1.0 ohm, test the appropriate ground circuit for a short to voltage or an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the following B+ circuit terminals and ground.
- Terminal 2 (Left SOD Sensor)
- Terminal 2 (Right SOD Sensor)
- If the test lamp does not illuminate, test the appropriate B+ circuit for a short to ground or an open/high resistance.
- If all circuits test normal, replace the appropriate SOD 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.