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 1105 (REAR PARKING ASSIST SYSTEM)REPAIR INSTRUCTIONSREAR OBJECT 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 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Do not refinish previously painted sensors.
- Paint the new rear object sensor. Refer to Basecoat/Clearcoat Paint Systems in Paints/Coatings.
- Check the paint thickness to ensure it does not exceed 6 mils using a paint thickness gage suitable for non-ferrous metals. Refer to Paint Gages in Paints/Coatings.
- Align the keyhole (2) with the key (1) and press the rear object sensor bezel flush to the fascia.
- Install the housing to the cutouts on the bezel through the back side of the fascia.
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.