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 701 (LIGHTING SYSTEMS)REPAIR INSTRUCTIONSFOG LAMP AIMING PROCEDUREAIMING PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Aiming Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Aiming Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Park the vehicle on a level surface 7.6 m (25 ft) away from a wall or other flat surface.
Measure the distance from the floor to the center of the fog lamp (5).
Using this measurement, mark the horizontal centerline of the fog lamp (1) on the flat surface directly in front of the vehicle.

Fig 1: Fog Lamp Aiming Measurements
Courtesy of GENERAL MOTORS CORP.
Turn ON the fog lamps.
Reach under the rear lower edge of the front fascia in order to access the fog lamp vertical adjustment screw on the rear of the fog lamp.

Fig 2: Locating Fog Lamp Vertical Adjustment Screw

Courtesy of GENERAL MOTORS CORP.

Adjust the fog lamp so that the top edge of the fog lamp beam pattern is 100 mm (4 in) below the horizontal centerline.
Turn OFF the fog lamps.

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.