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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1746 (LIGHTING SYSTEM)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 1746 (Lighting System)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 1746 (Lighting System)
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Lighting Systems Component Views
- Lighting Systems Connector End Views
- Ambient Light Sensor
- Backup Lamp - Left
- Backup Lamp - Right
- Backup Switch (L61 w/M/T)
- Center High Mount Stop Lamp (CHMSL)
- Courtesy/Map Lamp
- Daytime Running Lamps (DRL) Resistor
- Dimmer Switch (Dash Illumination)
- Dome Lamp - Front
- Dome Lamp - Rear
- Door Jamb Switch - Driver
- Door Jamb Switch - Front Passenger
- Door Jamb Switch - LR
- Door Jamb Switch - RR
- Fog Lamp - Left (T96)
- Fog Lamp - Right (T96)
- Fog Lamp Switch (T96)
- Hazard Switch
- Headlamp - Left - High Beam
- Headlamp - Left - Low Beam
- Headlamp - Right - High Beam
- Headlamp - Right - Low Beam
- License Lamp - Left
- License Lamp - Right
- Liftgate Lamp - Left
- Liftgate Lamp - Right
- Park/Stop Lamp - LR
- Park/Stop Lamp - RR
- Park/Turn Signal Lamp - LF
- Park/Turn Signal Lamp - LR
- Park/Turn Signal Lamp - RF
- Park/Turn Signal Lamp - RR
- PRNDL Lamp
- Stop Lamp Switch
- Turn Signal Flasher Relay
- Turn Signal/Multifunction Switch
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Diagnostic Starting Point - Lighting Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC B1482
- DTC B2532
- DTC B2533
- DTC B2575
- DTC B2577
- DTC B2578
- DTC B2585
- DTC B2587
- DTC B2588
- DTC B2600
- DTC B2602
- DTC B2603
- DTC B2622
- DTC B2623
- DTC B2627
- DTC B2628
- DTC B2647
- DTC B2662
- DTC B2743
- DTC P0504
- DTC P1574 (ECMw/L61)
- DTC P1574 (PCMw/L66)
- DTC P1574 (TCMw/L61w/MN5)
- Symptoms - Lighting Systems
- Backup Lamps Always On
- Backup Lamps Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative
- Daytime Running Lamps (DRL) Indicator Inoperative
- Daytime Running Lamps (DRL) Inoperative
- Dome Lamps Inoperative
- Fog Lamps Always On
- Fog Lamps Inoperative
- Hazard Lamps Inoperative
- Headlamps Inoperative - High Beams
- Headlamps Inoperative - Low Beams
- Low and High Beams Headlamps Inoperative
- Headlamps Flash to Pass Inoperative
- High Beam Indicator Inoperative
- Illuminated Entry Lamps Inoperative
- Park Lamps Always On
- Park Lamps Inoperative
- Stop Lamps Inoperative
- Turn Signal Lamps and/or Indicators Inoperative
- Repair Instructions
- Stop Lamp Switch Adjustment
- Stop Lamp Switch Replacement
- Fog Lamp Switch Replacement
- Front Side Door Jamb Switch Replacement
- Instrument Panel Dimmer Switch Replacement
- Ambient Light Sensor Replacement
- Hazard and Turn Signal Flasher Replacement
- Reading Lamp Bulb Replacement
- Reading Lamp Replacement
- Front Floor Flood Lamp Replacement
- Floor Flood Lamp Switch Replacement (Driver Side)
- Floor Flood Lamp Switch Replacement (Passenger Side)
- Transmission Floor Shift Control Indicator Lamp Replacement
- Dome Lamp Replacement
- Dome Lamp Bulb Replacement
- Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement
- Headlamp Bulb Replacement
- Headlamp Aiming
- Front Fog Lamp Replacement
- Front Fog Lamp Bulb Replacement
- Front Fog Lamp Cover Replacement
- Fog Lamp Aiming
- High Mounted Stop Lamp Replacement
- High Mounted Stop Lamp Bulb Replacement
- Cargo Lamp Bulb Replacement
- Rear License Lamp Replacement
- License Lamp Bulb Replacement
- Tail Lamp Replacement
- Tail Lamp Bulb Replacement
- Rear Liftgate Lamp Replacement
- Description and Operation
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.