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 1606 (LIGHTING SYSTEMS)REPAIR INSTRUCTIONSAMBIENT LIGHT SENSOR REPLACEMENTINSTALLATION PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Position the sensor to the trim pad.

Fig 1: Locating Ambient Light Sensor
Courtesy of GENERAL MOTORS CORP.
In order to install the sensor to the trim pad, rotate the sensor clockwise 1/4 turn.
Position the trim pad to the upper portion of the instrument panel (IP).

Fig 2: View Of Instrument Panel (I/P) Upper Trim Pad

Courtesy of GENERAL MOTORS CORP.

Connect the electrical connector to the sensor.
Remove the shop rags from the windshield defrost vents.
Install the trim pad to the IP. Refer to TRIM PAD REPLACEMENT - INSTRUMENT PANEL (I/P) UPPER in Instrument Panel Gages and Console.
Install the windshield garnish moldings. Refer to GARNISH MOLDING REPLACEMENT - WINDSHIELD PILLAR in Interior Trim.

RENDER: 1.0x

NO RELATED

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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.