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)REPAIR INSTRUCTIONSHEADLAMP BULB REPLACEMENT

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Headlamp Bulb Replacement

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Headlamp Bulb Replacement

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.

Fig 1: Headlamp Bulbs And Components

Courtesy of GENERAL MOTORS CORP.

Headlamp Bulb Replacement

Callout	Component Name
NOTE: Refer to Fastener Notice . Preliminary Procedures Open the hood. Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement (Redline) or Front Bumper Fascia Replacement (Standard) . Remove the front headlamps. Refer to Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement .
1	Front Park and Turn Signal Lamp Socket Tip: Turn Lamp socket counterclockwise in order to remove from the headlamp assembly.
2	Front Park and Turn Signal Lamp Bulb Tip: Pull the park and turn signal lamp bulb straight from the bulb socket.
3	Headlamp Bulb (Lo Beam) CAUTION: Refer to Halogen Bulb Caution . Tip: Disconnect the electrical connector from the headlamp bulb socket and turn bulb socket a quarter turn counterclockwise in order to remove.
4	Headlamp Bulb (High Beam) CAUTION: Refer to Halogen Bulb Caution . Tip: Disconnect the electrical connector from the headlamp bulb socket and turn bulb socket a quarter turn counter clockwise in order to remove.

RENDER: 1.0x

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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.