However, I can give you a *general* overview. The process typically involves these steps, but *variations exist depending on the exact model and trim level*. Do not attempt this without the proper tools and a repair manual.
1. Disconnect the Battery: This is the most crucial first step. Disconnect the negative (-) terminal first to prevent accidental shorts.
2. Steering Wheel Removal (Possibly): Access to the ignition switch often requires removing the steering wheel. This involves removing the steering wheel retaining nut (often requiring a special tool), then carefully pulling the wheel off the steering column. This step is potentially dangerous and should only be attempted if you have experience. Refer to your repair manual for this procedure.
3. Column Shroud Removal: The ignition switch is usually located behind a shroud or cover on the steering column. You'll need to remove this shroud, which may involve removing screws or clips.
4. Wiring Harness Disconnection: Once the shroud is removed, you'll see the ignition switch. Carefully disconnect the wiring harness connector(s) from the switch. Take pictures or make notes of the connector positions to ensure proper reassembly.
5. Ignition Switch Removal: The ignition switch itself may be held in place by screws or a retaining clip. Remove these fasteners to release the switch.
6. Replacement (if applicable): Install the new ignition switch, ensuring all wiring connectors are securely attached.
7. Reassembly: Carefully reverse the removal process, reattaching the shroud, steering wheel (if removed), and battery cable.
Important Considerations:
* Security: Some ignition switches have anti-theft mechanisms. Improper removal could trigger these, potentially disabling your vehicle.
* Tools: You'll likely need various tools, including screwdrivers (Phillips and possibly flathead), possibly a steering wheel puller, sockets, and possibly a retaining clip tool.
* Precision: Work carefully to avoid damaging wiring or components.
Again, I strongly advise against attempting this repair without a repair manual specific to your 1990 Pontiac 6000 LE. If you're not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. The risk of causing further damage far outweighs the potential cost savings of DIY.