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 1320 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)REPAIR INSTRUCTIONSINFLATABLE RESTRAINT SIDE IMPACT 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 Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Side Impact Sensor And Fasteners

Courtesy of GENERAL MOTORS CORP.

Install the side impact sensor (1).

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the side impact sensor fasteners (2).
Tighten: Tighten the fasteners to 8 N.m (71 lb in).
Install the side impact sensor electrical connector.
Install the front seat belt retractor. Refer to Seat Belt Retractor Replacement - Left Front or Seat Belt Retractor Replacement - Right Front in Seat Belts.
Install the center pillar lower trim panel. Refer to Trim Panel Replacement - Lower Center Pillar in Interior Trim.
Install the rear door sill plate. Refer to Door Sill Plate Replacement in Interior Trim.
Install the front door sill plate. Refer to Door Sill Plate Replacement in Interior Trim.
Enable the SIR system. Refer to SIR Disabling and Enabling Zones .

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.