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 1005 (DATA COMMUNICATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1001CIRCUIT/SYSTEM VERIFICATIONB1001 00
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
B1001 00
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION B1001 00
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Program the body control module (BCM). Refer to Service Programming System (SPS) .
- If the DTC remains current, replace the BCM.
B1001 45
- Program the restraints ID into the BCM.
- Retrieve DTCs from the BCM. DTC B1001 45 should change to a history DTC.
- If the DTC remains current, replace the BCM.
B1001 4B
- Program the tire/axle RPO into the BCM.
- Retrieve DTCs from the BCM. DTC B1001 4B should change to a history DTC.
- If the DTC remains current, replace the BCM.
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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.