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 MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 9 (BODY CONTROL MODULES)DIAGNOSTIC TESTSDTC B1000: CONTROL MODULE MALFUNCTIONTESTING
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
DTC B1000: Control Module Malfunction: Testing
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Testing
WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Perform diagnostic system check for suspect system control module. See DIAGNOSTIC SYSTEM CHECK table under SELF-DIAGNOSTIC SYSTEM. Repair as necessary and go to step 4. If diagnostic system check has been performed for suspect system control module, go to next step.
- Check if DTC B1000 was set as a current DTC. If DTC B1000 was set as a current DTC, go to next step. If DTC B1000 was not set as a current DTC go to DIAGNOSTIC AIDS before proceeding to next step.
- Replace, suspect control module. Program and configure new control module. Go to next step.
- Using scan tool, clear DTCs. Operate vehicle within CODE ENABLE CRITERIA conditions. Using scan tool, retrieve DTCs. If DTC B1000 resets, return to step 2. If DTC B1000 does not reset, system is okay.
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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.