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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 101 (LIGHTING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Diagnostic Code Index
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1480 | B1480 00: Battery Rundown Protection Circuit |
| DTC B2530 | B2530: Front Fog Lamps Control Circuit |
| DTC B2545 | B2545: Backup Lamps Circuit |
| DTC B2555 | B2555 05: Passenger Compartment Lamp Control Circuit Short to Battery/Open. |
| DTC B2575 | B2575: Headlamp Control Circuit |
| DTC B2580 | B2580: Headlamp High Beam Control Circuit |
| DTC B2585 | B2585: Park Lamp Control Circuit |
| DTC B2625 | B2625: Display Dimming Pulse Width Modulation (PWM) Output Circuit |
| DTC B2645 | B2645: Ambient Light Sensor Circuit |
| DTC B3903 | B3903: Stop Lamp Relay Circuit |
| DTC B3948 | B3948 02: Left Front Turn Signal Circuit Short to Ground B3948 05: Left Front Turn Signal Circuit Short to Battery or Open |
| DTC B3949 | B3949 02: Right Front Turn Signal Circuit Short to Ground B3949 05: Right Front Turn Signal Circuit Short to Battery or Open |
| DTC B3950 | B3950 02: Left Rear Turn Signal Circuit Short to Ground B3950 05: Left Rear Turn Signal Circuit Short to Battery or Open |
| DTC B3951 | B3951 02: Right Rear Turn Signal Circuit Short to Ground B3951 05: Right Rear Turn Signal Circuit Short to Battery or Open |
| DTC C0277 | C0277 06: Brake Pedal Position Sensor Circuit Short to Ground or Open C0277 07: Brake Pedal Position Sensor Circuit Voltage Above Threshold C0277 09: Brake Pedal Position Sensor Circuit Rate of Change Above Threshold |
| DTC C0278 | C0278 00: Brake Pedal Position Sensor Not Calibrated |
| DTC C0870 | C0870 03: Device Voltage Reference Output 1 Circuit Voltage Below Threshold C0870 07: Device Voltage Reference Output 1 Circuit Voltage Above Threshold |
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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.