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.
2003 Chevrolet Chevy Express H2500FACTORY OEM SERVICE PROCEDURE
Lighting DTCS
LIGHTING DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B0951 | Headlamp On Indicator, LED Dimming Or Backlight Lamps |
| DTC B1480 | Inadvertent Power Supply Voltage Circuit |
| DTC B2575 | Low Beam Headlamp Relay Control Circuit |
| DTC B2580 | High Beam Headlamp Relay Control Circuit |
| DTC B2585 | Park Lamp Relay Control Circuit |
| DTC B2600 | DRL Low Control Circuit |
| DTC B2610 | Backlight Lamps Control Circuit, Instrument Panel Lamps Dimming Control Or LED Dimming Signal Circuit |
| DTC B2615 (Without YF7 RPO Code) | Courtesy Lamp Supply Voltage |
| DTC B2615 (With YF7 RPO Code) | Courtesy Lamp Supply Voltage |
| DTC B2620 | BCM Monitored Voltage |
| DTC B2625 | Backlight Lamps Control Circuit, Instrument Panel Lamps Dimming Or LED Dimming Signal Circuit |
| DTC B3801 | Instrument Panel Dimmer Switch Signal Voltage |
| DTC B3802 | Headlamp Switch Park Lamps On Signal Circuit Or Headlamp Switch Headlamps On Signal Circuit |
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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