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.
Circuit/System Testing
2008 Pontiac Grand Prix BaseSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2007 Buick LaCrosse and 2007 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, use the scan tool to request SIR DTCs. Verify that DTC B1001 is set as current.
- If DTC B1001 is history, clear codes and recheck.
- Using the scan tool check the BCM that is programmed with the VIN. Verify that the BCM is programmed with the correct VIN number with the vehicle VIN plate.
- If the BCM has the wrong VIN number, refer to BCM replacement in Repair Instructions for programming.
- Using the scan tool perform the Setup SDM Part Number into BCM procedure. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement in Repair Instructions for programming.
- With the ignition ON use the scan tool to clear the DTCs. Verify that DTC B1001 is cleared.
- If DTC B1001 was current replace the SDM.
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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.