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.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISSTEERINGSTEERING WHEEL & STEERING COLUMNREPAIR INSTRUCTIONSIGNITION SWITCH REPLACEMENTREMOVAL PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure

Disable the SIR system. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM in Air Bag Restraint Systems.
Remove the upper and lower trim covers. Refer to STEERING COLUMN TRIM COVERS REPLACEMENT .
IMPORTANT: The abrasion sleeve located on the steering column wire harness assembly must be reinstalled. Make note of what connector is coming out of the abrasion sleeve for installation purposes.
Remove the wire harness strap (2) from the steering column and the wire harness assembly (1).

Fig 1: Removing Wire Harness Strap From Steering Column And Wire Harness Assembly
Courtesy of GENERAL MOTORS CORP.
Slide the 2 connectors (2) of the turn signal and multifunction switch assembly out of the bulkhead connector (1).

Fig 2: Removing Turn Signal & Multifunction Switch Assembly Connector From Bulkhead Connector
Courtesy of GENERAL MOTORS CORP.
Rotate the key alarm connector (1) 90 degrees.
Pull the key alarm connector (1) out of the ignition lock cylinder case (2).
Remove the passkey connector from the ignition lock cylinder case (2).

Fig 3: Removing Key Alarm Connector From Ignition Lock Cylinder Case
Courtesy of GENERAL MOTORS CORP.
Insert J 42759 into the ignition lock cylinder case (1) and slide the ignition switch (2) out.

Fig 4: Inserting Tool Into Ignition Lock Cylinder Case & Removing Ignition Switch
Courtesy of GENERAL MOTORS CORP.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.