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.
2000 Chevrolet Astro Van Cargo, RWDFACTORY OEM SERVICE PROCEDURE
Body Control Modules & Data Link Communications System
- Description
- Operation
- Component Locations
- Programming
- Trouble Shooting
- Self-Diagnostic System
- System Tests
- Diagnostic Tests
- DTC B1397: Device Voltage Reference Out # 1 Circuit Low
- DTC B1398: Device Voltage Reference Out # 1 Circuit High
- DTC B1477: Retained Accessory Power (Rap) Circuit Low
- DTC B1478: Retained Accessory Power (Rap) Circuit High
- DTC B1480: Battery Rundown Protection Circuit Malfunction
- DTC U1000 & U1255: Class 2 Communication Malfunction
- DTC U1001-U1097: Loss Of XXX Communications
- DTC U1300: Class 2 Serial Data Link Low
- DTC U1301: Class 2 Serial Data Link High
- DTC U1305: Class 2 Data Link Low Or High
- Removal & Installation
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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