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.
2007 Hummer H3 AutomaticFACTORY OEM SERVICE PROCEDURE
Section 8 (Lighting Systems)
WARNING: This page is about a different car, the 2005 GMC Canyon and 2005 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Lighting Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC B0527, B0528, or B0529
- DTC B0532, B0533, or B0534
- DTC B2532 or B2533
- DTC B2557 or B2558
- DTC B2562 or B2563
- DTC B2575
- DTC B2582 or B2583
- DTC B2585
- DTC B2622 or B2623
- DTC B2624
- DTC B2647 or B2648
- Symptoms - Lighting Systems
- Backup Lamps Always On
- Backup Lamps Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative
- Daytime Running Lamps (DRL) Always On
- Daytime Running Lamps (DRL) Indicator Inoperative
- Daytime Running Lamps (DRL) Inoperative
- Daytime Running Lamps (DRL) On with Park Brake Applied
- Fog Lamp Indicator Inoperative
- Fog Lamps Always On
- Fog 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
- License Lamps Inoperative
- Marker Lamps Inoperative
- Park Lamps Inoperative
- Park, License, and Tail Lamps Always On
- Park, License, and Tail Lamps Inoperative
- Stop Lamps Always On
- Stop Lamps Inoperative
- Tail Lamps Inoperative
- Turn Signal Lamps and/or Indicators Always On or Flashing
- Turn Signal Lamps and/or Indicators Inoperative
- Repair Instructions
- Stop Lamp Switch Replacement
- Headlamp Switch Replacement
- Door Jamb Switch Replacement
- Hazard Warning Switch Replacement
- Ambient Light Sensor Replacement
- Dome Lamp Replacement
- Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement
- Headlamp Aiming
- Fog Lamp Replacement - Front (Canyon)
- Fog Lamp Replacement - Front (XTREME)
- Fog Lamp Bulb Replacement - Front (Canyon)
- Fog Lamp Bulb Replacement - Front (XTREME)
- Fog Lamp Aiming Procedure (Canyon)
- High Mounted Stop Lamp Replacement
- High Mounted Stop Lamp Bulb Replacement
- License Lamp Bulb Replacement
- Tail Lamp Assembly and/or Backup, Sidemarker, Stop, Turn Signal Bulb Replacement
- Description and Operation
Factory Service Tools
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.