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 1097 (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 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Aligning SIR Coil Assembly With Horn Tower

Courtesy of GENERAL MOTORS CORP.

Install the inflatable restraint steering wheel module coil (1) to the steering shaft (2).
Center the inflatable restraint steering wheel module coil. Refer to Inflatable Restraint Steering Wheel Module Coil Centering in Steering Wheel and Column.
Route the lower coil wire harness along the steering column jacket.
Install the wire harness straps to the steering column wire harness.
Install the upper and lower shrouds. Refer to Steering Column Trim Covers Replacement in Steering Wheel and Column.
Install the steering wheel. Refer to Steering Wheel Replacement in Steering Wheel and Column.
Install the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement (Aztek) or Inflatable Restraint Steering Wheel Module Replacement (Rendezvous) .
Enable the SIR System. Refer to SIR Disabling and Enabling Zone 3 .

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.