Here's a general approach; however, consult a repair manual specific to your 2000 Impala for precise wiring diagrams and steps:
1. Identify the Disconnected Connections:
* Carefully examine the wiring harness connected to the ignition switch. Take pictures before disconnecting anything in the future. Label each wire with its location if possible. A repair manual is essential here. These connectors can be easily mismatched and lead to electrical issues.
* Use a wiring diagram to trace each wire and its purpose. This step is vital to avoid causing electrical damage.
2. Removing the Tumbler (Cylinder):
* Look for retaining clips or screws: The tumbler is likely held in place by small retaining clips or screws. These might be hidden. You might need a small flat-head screwdriver or a pick tool to carefully release them.
* There might be a retaining ring: Some ignition switches have a ring that needs to be compressed or carefully removed to release the cylinder. Again, a repair manual will show you exactly what to expect.
* Do not force anything: If you are encountering resistance, you are likely missing a step or using the wrong tool. Refer to the repair manual.
3. Installing the New Tumbler:
* Ensure the new tumbler matches your key: Make absolutely sure you have the correct tumbler for your vehicle and key. Getting the wrong one will render your key useless.
* Insert the new tumbler: Carefully align and install the new tumbler into the ignition switch housing, ensuring it seats correctly. You should feel it click into place.
* Reattach retaining clips or screws: Secure the tumbler using the same clips or screws that held the old one.
4. Reassembling and Reconnecting:
* Reconnect the wiring harness: Carefully reattach the wiring harness to the ignition switch, matching each wire to its correct location. Refer to your wiring diagram or repair manual. Double and triple-check this step!
* Reinstall the ignition switch into the dash: This is usually done in reverse order of removal.
5. Testing:
* Test the ignition: Once everything is reassembled, test the ignition switch to ensure it works correctly and the car starts. Check all other related functions (lights, power accessories) to ensure there was no damage during the process.
Important Considerations:
* Repair Manual: This is absolutely vital. A Haynes or Chilton manual specific to your 2000 Chevy Impala will provide diagrams and step-by-step instructions that are far more accurate than anything I can provide.
* Professional Help: If you're uncomfortable working with car electrical systems, it's best to take your car to a qualified mechanic. Incorrect reconnection can cause serious problems.
* Safety: Disconnect the battery's negative terminal before starting any work to prevent accidental short circuits.
This is a complex procedure. Without a repair manual for your specific vehicle, attempting this could lead to damage or injury. Prioritize safety and seek professional help if needed.
