Tools You'll Likely Need:
* Security Torx bits: These are crucial. The steering column usually requires these. Sizes will vary, so check your manual.
* Small flathead screwdriver: Possibly needed for prying or adjusting small parts.
* Phillips head screwdriver: May be needed, depending on your vehicle.
* Pliers: For gripping small parts.
* Ignition switch removal tool: This specialized tool makes the job much easier. You can usually find these at auto parts stores. Without it, the process becomes significantly more challenging.
* New ignition lock cylinder: Make sure to get the correct one for your 1990 S10. The key number is critical.
* New ignition key: You'll likely need a new key that matches the new cylinder.
* Penetrating oil (like PB Blaster): This can help loosen any rusted or stuck screws.
General Steps (Consult your repair manual for precise details):
1. Disconnect the battery: This is crucial for safety. Disconnect the negative terminal first.
2. Remove the steering wheel: This is usually the most challenging part. It involves removing the steering wheel retaining bolt (likely a Torx) and then carefully separating the wheel from the steering column shaft. Be extremely careful here – the steering wheel airbag (if equipped) requires special handling to avoid deployment. This step may require specialized tools.
3. Access the ignition lock cylinder: Once the steering wheel is off, you'll need to access the ignition lock cylinder. This usually involves removing shrouds and panels around the steering column. Your repair manual will show exactly how to do this.
4. Remove the ignition lock cylinder: This is where the ignition switch removal tool is essential. The tool is inserted into the cylinder to help you remove it properly without damaging the surrounding components.
5. Install the new ignition lock cylinder: Carefully insert the new cylinder using the removal tool. Ensure it's properly seated.
6. Reassemble everything: Put the steering wheel back on, reinstall the column shrouds, and reconnect the battery.
7. Test the ignition: Make sure the new cylinder works correctly and starts the truck.
Important Considerations:
* Key Number: The key number is essential when ordering a new ignition lock cylinder. Without it, you won't get the right one.
* Security System: If your truck has an aftermarket security system, it might interfere with the ignition system. You may need to consult the security system's manual.
* Professional Help: If you're uncomfortable performing this task, take your vehicle to a qualified mechanic. This is a complex job that, if done incorrectly, could leave your vehicle vulnerable to theft or damage.
Again, a repair manual is absolutely essential. This process is described generally, and specific steps will vary depending on your S10's exact model and configuration. The manual will provide detailed diagrams and instructions, greatly reducing the risk of damage.
