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 1744 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)REPAIR INSTRUCTIONSINFLATABLE RESTRAINT STEERING WHEEL MODULE COIL 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 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: A new roll connector is equipped with a yellow tab that is removed after the steering wheel is installed. This tab passes through the steering wheel.

Route the SIR wiring harness and horn/cruise connector down steering column.

Fig 1: Removing & Installing Inflatable Restraint Steering Wheel Module Roll Connector

Courtesy of GENERAL MOTORS CORP.

Snap the SIR coil into position on the column.
Connect the SIR coil and horn/cruise electrical connectors.
Attach the wiring harness clips to the bracket below the column.
Install the steering column covers. Refer to Steering Column Trim Covers Replacement .
Install the steering wheel. Refer to Steering Wheel Replacement .
Install the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
Enable the SIR system. Refer to SIR Disabling and Enabling .

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.