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 MANUALSCHEVROLET2003CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 6.0 UREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINTERIOR/ILLUMINATION LIGHTSLIGHTING SYSTEMS
2003 Chevrolet Chevy Express G2500, Van Cargo Extended, 6.0 U
Lighting Systems
2003 Chevrolet Chevy Express G2500, Van Cargo Extended, 6.0 USECTION Lighting Systems
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Lighting Systems
- Diagnostic System Check - Lighting Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- 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
- Symptoms - Lighting Systems
- Backup Lamps Always On
- Backup Lamps Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative (Lamps)
- Courtesy Lamps Inoperative (Defeat Switch)
- Daytime Running Lamps (DRL) Inoperative (Lamps)
- Daytime Running Lamps (DRL) Inoperative (Defeat Switch)
- Dome Lamps Inoperative
- Hazard Lamps Always On
- Hazard Lamps Inoperative
- Headlamps Always On - Low or High Beam
- Headlamps Inoperative - High Beams
- Headlamps Inoperative - Low Beams
- Headlamps Inoperative - Low and High Beams
- Headlamps Inoperative - Flash to Pass
- High Beam Indicator Always On
- High Beam Indicator Inoperative
- Interior Backlighting Does Not Dim
- Interior Backlighting Inoperative
- Park, License, and Tail Lamps Always On
- Park, License, and Tail Lamps Inoperative
- Reading Lamp(s) Inoperative
- Stop Lamps Always On
- Stop Lamps Inoperative
- Turn Signal Lamps and/or Indicators Always On or Flashing
- Turn Signal Lamps and/or Indicators Inoperative
- Underhood Lamp Inoperative
- Vanity Mirror Lamp(s) Inoperative
- Repair Instructions
- Stop Lamp Switch Replacement
- Headlamp Switch Replacement
- Fog Lamp Switch Replacement - Rear
- Hazard and Turn Signal Flasher Replacement
- Vanity Mirror Lamp Bulb Replacement
- Dome Lamp Replacement
- Dome Lamp Bulb Replacement
- Underhood Lamp Replacement
- Headlamp Replacement - Sealed Beam
- Headlamp Bulb Replacement
- Headlamp Capsule Replacement
- Headlamp Aiming
- Alternate Aiming Procedure
- Fog Lamp Replacement - Rear
- Fog Lamp Bulb Replacement - Rear
- Position Lamp Replacement - Front
- Repeater Lamp Replacement
- Marker Lamp Replacement - Front Side (RPO Code T90, Export)
- Marker Lamp Replacement - Front Side (RPO Code X88/Z88)
- Park/Turn Signal Lamp Replacement (Uplevel Vehicles)
- Park/Turn Signal Lamp Replacement (Base Vehicles)
- High Mounted Stop Lamp Replacement
- Cargo Lamp Replacement
- Backup Lamp Replacement
- Backup Lamp Bulb Replacement
- License Lamp Replacement
- Tail Lamp Replacement
- Description and Operation
- Special Tools and Equipment
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.