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 MANUALSCHEVROLET2002AVALANCHE 2500, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1088 (LIGHTING SYSTEMS)
2002 Chevrolet Avalanche 2500, RWD
Section 1088 (Lighting Systems)
2002 Chevrolet Avalanche 2500, RWDSECTION Section 1088 (Lighting Systems)
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- 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
- DTC B0502: Low Voltage Level (an Open Or A Short To Ground) In R DRL Relay Control Circuit
- DTC B0503: High Voltage Level (A Short To Battery Positive Voltage Or BCM Open Internally) In R DRL Relay Control Circuit
- DTC B0507: Low Voltage Level (An Open Or A Short To Ground) In L DRL Relay Control Circuit
- DTC B0508: High Voltage Level (A Short To Battery Positive Voltage Or BCM Open Internally) In L DRL Relay Control Circuit
- DTC B2403: Front Fog Lamp Switch Signal Circuit Voltage
- DTC B2408: Rear Fog Lamp Switch Signal Circuit Voltage
- DTC B2482: Low Voltage Level (An Open Or A Short To Ground) In Backup Lamp Relay Control Circuit
- DTC B2483: High Voltage Level (A Short To Voltage Or BCM open internally) In Backup Lamp Relay Control Circuit
- DTC B2578: RH Turn Signal Monitor Circuit Voltage
- DTC B2583: LH Turn Signal Monitor Circuit Voltage
- DTC B2647: Ambient Light Sensor Circuit
- DTC B2648: Ambient Light Sensor Circuit
- Symptoms - Lighting Systems
- Repair Instructions
- Stop Lamp Switch Adjustment
- Stop Lamp Switch Replacement
- Fog Lamp Switch Replacement - Front
- Hazard Warning Switch Replacement
- Headlamp Control Module Replacement
- Daytime Running Lamps (DRL) Ambient Light Sensor Replacement
- Turn Signal Flasher Replacement
- Hazard Lamp Flasher Replacement
- Courtesy Lamp Replacement - Instrument Panel
- Instrument Panel (I/P) Compartment Lamp Switch Replacement
- Instrument Panel (I/P) Compartment Lamp Bulb Replacement
- Rearview Mirror Lamp Replacement
- Vanity Mirror Lamp Bulb Replacement
- Trans Floor Shift Control Indicator Lamp Replacement
- Underhood Lamp Replacement
- Underhood Lamp Bulb Replacement
- Headlamp Replacement
- Headlamp Bulb Replacement
- Headlamp Capsule Replacement
- Headlamp Opening Door Replacement
- Headlamp Opening Door Adjustment
- Headlamp Motor/Actuator Replacement
- Headlamp Bezel Replacement
- Headlamp Intermediate Bracket Replacement
- Headlamp Aiming (Visual Method)
- Headlamp Aiming (Export, LH Rule of the Road)
- Headlamp Aiming (Export, RH Rule of the Road)
- Fog Lamp Replacement - Front
- Fog Lamp Bulb Replacement - Front
- Fog Lamp Replacement - Rear
- Fog Lamp Bulb Replacement - Rear
- Fog Lamp Aiming Procedure
- Position Lamp Replacement - Front (Europe Japan)
- Position Lamp Bulb Replacement (Europe Japan)
- Repeater Lamp Replacement (Europe Japan)
- Repeater Lamp Bulb Replacement (Europe Japan)
- Marker Lamp Replacement - Side
- Marker Lamp Bulb Replacement - Side
- Park/Turn Signal/Side Marker Lamp Replacement
- Park/Turn Signal/Side Marker Lamp Bulb Replacement
- High Mounted Stop Lamp Replacement
- Cargo Lamp Replacement
- Cargo Lamp Bulb Replacement
- Backup Lamp Replacement
- Backup Lamp Bulb Replacement
- License Lamp Replacement
- License Lamp Bulb Replacement
- Tail Lamp Replacement
- Tail/Turn Signal Lamp Replacement (Europe, Japan)
- Tail/Backup Lamp Replacement (Europe)
- Description and Operation
- Exterior Lighting Systems Description and Operation
- Exterior Lamps
- Headlamps
- Lights On Warning
- Daytime Running Lamps (DRL)
- Headlight Doors
- Fog Lamps
- Park, Tail and Marker Lamps
- Remote Keyless Entry Exterior Lamp Illumination
- Turn Signal Lamps
- Turn Signal Reminder
- Stop lamps
- Export
- Domestic
- Backup Lamps
- Battery Rundown Protection / Inadvertent Power
- Lighting System Indicator(s)
- Interior Lighting Systems Description and Operation
- Exterior Lighting Systems Description and Operation
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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.