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 1931 (LIGHTING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2652CIRCUIT/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 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X2 harness connector at the BCM.
- Verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Reconnect the X2 harness connector at the BCM.
- Ignition ON, with a scan tool clear all DTCs.
- Ignition OFF, disconnect the harness connectors at the following components:
- Garage door opener
- PRNDL lamp
- Rear seat audio (RSA) control harness connector X1
- Ignition ON, operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
- If the DTC resets, test the appropriate signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM.
- Garage door opener terminal 2
- PRNDL lamp terminal 2
- Rear seat audio (RSA) terminal 7 X1
- If the DTC resets, test the appropriate signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM.
- Reconnect each component one at a time and verify the DTC does not reset as current.
- If the DTC resets as current, test or replace the component responsible for setting the DTC.
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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.