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 11 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)REMOVAL & INSTALLATIONSIR COIL ASSEMBLYINSTALLATION
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Sir Coil Assembly: Installation
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation
WARNING: This page is about a different car, the 2000 Buick Park Avenue. However, it is still accessible from the selected car via links, so may be relevant.
- Install SIR coil assembly onto steering shaft. Center SIR coil assembly if necessary. See CENTERING COIL ASSEMBLY under ADJUSTMENTS. Install retaining ring. Route steering column wire harness along steering shaft, install wire harness straps and connect electrical connector. Install steering wheel.
- To complete installation, reverse removal procedure. Tighten screws to proper specification. See TORQUE SPECIFICATIONS . Activate air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM . Check system for proper operation. See SYSTEM OPERATION CHECK .
RENDER: 1.0x
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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.