Here's a general overview of the process. Specific steps and tool requirements might vary slightly depending on your exact model and trim level:
1. Preparation:
* Safety First: Disconnect the negative battery cable to prevent electrical shock.
* Gather Tools: You'll likely need a variety of tools, including:
* Screwdrivers (Phillips and possibly flathead)
* Socket set (metric)
* Possibly a torque wrench
* Wiring diagram (highly recommended – consult a repair manual specific to your 1999 Buick LeSabre)
* Penetrating oil (like PB Blaster)
* Possibly a steering wheel lock removal tool
* Repair Manual: A service manual specific to your 1999 Buick LeSabre is *essential*. It will provide detailed instructions, diagrams, torque specifications, and wiring information. Don't attempt this without one.
2. Accessing the Ignition Switch:
* Steering Column Removal (Possibly): On some vehicles, partial or complete steering column removal may be necessary to access the ignition switch. This is often the most challenging part of the job and may require special tools. Your repair manual will detail this process if needed.
* Column Covers and Trim: Remove any trim panels or covers around the steering column to expose the ignition switch. This often involves carefully prying things apart – be gentle to avoid breakage.
3. Replacing the Ignition Switch:
* Disconnect Electrical Connectors: Carefully disconnect the electrical connectors from the old ignition switch. Take pictures or make notes of the connections before disconnecting to ensure correct reassembly.
* Remove the Old Switch: The switch is usually held in place by screws or a retaining clip. Use the appropriate tools to remove it. Penetrating oil might be helpful if screws are seized.
* Install the New Switch: Carefully install the new ignition switch, ensuring it's properly seated and aligned.
* Reconnect Electrical Connectors: Reconnect the electrical connectors to the new ignition switch, referencing your notes or pictures.
* Reassemble: Reinstall any covers, trim panels, and the steering column (if removed).
4. Testing:
* Reconnect Battery: Reconnect the negative battery cable.
* Test the Ignition: Turn the key to test all ignition positions (accessory, ignition, start). Check that everything works correctly (lights, radio, engine starting).
Important Considerations:
* Matching the Replacement Switch: Make absolutely sure you purchase the correct ignition switch for your 1999 Buick LeSabre. The wrong switch won't work, and you may damage other components. Use your vehicle's VIN number when ordering parts to ensure compatibility.
* Wiring: Pay extremely close attention to the wiring. Incorrect connections can lead to electrical problems or even a fire.
* Security: The ignition switch may be linked to your vehicle's anti-theft system. There is a risk of disabling your anti-theft system if this is not handled properly.
Again, this is a complex repair. If you are not comfortable with this level of automotive repair, take your car to a qualified mechanic. The cost of a professional repair will be far less than the potential cost of damaging your vehicle.
