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 1618 (STEERING WHEEL AND STEERING COLUMN)REPAIR INSTRUCTIONSIGNITION SWITCH REPLACEMENTREMOVAL PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Refer to SIR CAUTION in Cautions and Notices.

Disable the SIR system. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM in Air Bag Restraint Systems.
Remove the trim covers from the steering column. Refer to STEERING COLUMN TRIM COVERS REPLACEMENT .
Disconnect the steering column electrical connectors.

Fig 1: Disconnecting Steering Column Electrical Connectors
Courtesy of GENERAL MOTORS CORP.
Remove the steering column wiring harness tie straps (3).

Fig 2: Removing Steering Column Wiring Harness Tie Straps
Courtesy of GENERAL MOTORS CORP.
Remove the wire harness (1) from the steering column and from the wire harness strap (2).

Fig 3: Removing Wire Harness From Steering Column
Courtesy of GENERAL MOTORS CORP.
Remove and dispose of the small wire harness straps from the wire harness straps from the wire harness assembly (1).
Disconnect the multifunction switch electrical connectors (2) from the bulkhead connector (1).

Fig 4: Disconnecting Multifunction Switch Electrical Connectors
Courtesy of GENERAL MOTORS CORP.
Remove the key alarm connector (1) from the ignition lock cylinder case assembly (2) using the following procedure:
1. 8.1. Rotate the key alarm connector (1) 90 degrees.
2. 8.2. Pull the key alarm connector (1) out of the ignition lock cylinder case assembly (2).
3. 8.3. Remove the passkey connector from the ignition lock cylinder case assembly (2).
Fig 5: Removing Key Alarm Connector From Ignition Lock Cylinder Case Assembly
Courtesy of GENERAL MOTORS CORP.
Slide the ignition switch assembly (3) out of the ignition lock cylinder case assembly (1).

Fig 6: Removing Ignition Switch Assembly
Courtesy of GENERAL MOTORS CORP.

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.