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 435 (RETAINED ACCESSORY POWER SYSTEM)
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
Section 435 (Retained Accessory Power System)
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Section 435 (Retained Accessory Power System)
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Starting Point Retained Accessory Power
- Diagnostic System Check - Retained Accessory Power
- Scan Tool Output Control
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B1477: Short To Ground In The RAP Relay Control Feed Circuit
- DTC B1478: Short To Battery Or Open In RAP Relay Control Feed Circuit
- Symptoms - Retained Accessory Power
- Symptom List
- Description and Operation
RENDER: 1.0x
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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.