Before You Begin:
* Safety First: Disconnect the negative battery cable before starting any work on the electrical system.
* Gather Tools: You'll need screwdrivers (Phillips and possibly flathead), possibly sockets and wrenches (sizes will depend on your truck), pliers, and possibly a wiring diagram.
* Repair Manual: A Chilton's or Haynes repair manual for your specific year and model truck is highly recommended. It will provide detailed pictures and instructions, crucial for this job.
General Steps (Adapt to your specific truck):
1. Steering Wheel Removal (Possibly): In some cases, you might need to remove the steering wheel to access the ignition switch. This requires special tools and is potentially dangerous if not done correctly. Only attempt this if your repair manual specifies it's necessary. If you're not comfortable with this, it's best to seek professional help.
2. Column Shroud Removal: The ignition switch is usually located behind a plastic shroud surrounding the steering column. Carefully remove the screws or clips holding this shroud in place. This often involves removing some trim pieces around the steering column.
3. Disconnect Wiring Harness: Once the shroud is removed, you'll see the ignition switch. Carefully disconnect the wiring harness connectors attached to the switch. Take photos or make a detailed diagram of how the wires are connected before disconnecting anything! This will be crucial for reassembly.
4. Remove the Ignition Switch: The ignition switch is usually held in place by screws or a retaining clip. Remove these fasteners and carefully pull the switch out. There may be a small retaining tab or mechanism. Be gentle to avoid damaging anything.
5. Install the New Ignition Switch: Insert the new ignition switch, aligning it correctly. Secure it with the screws or retaining clip.
6. Reconnect Wiring Harness: Reconnect the wiring harness connectors, ensuring that each wire goes back to its original position. Refer to your photos or diagram.
7. Reassemble: Reinstall the column shroud and any trim pieces you removed. If you removed the steering wheel, reinstall it carefully.
8. Reconnect Battery Cable: Connect the negative battery cable.
9. Test: Turn the ignition key to verify that the switch is working correctly. Test all the ignition positions (accessory, start, run).
Important Considerations:
* Ignition Key: You'll need your original key or a new key that's programmed correctly. Some ignition switches require programming.
* Wiring Diagram: A wiring diagram is essential for proper reconnection of the wiring harness. Get one from your repair manual or online resources specific to your truck model.
* Professional Help: If you're uncomfortable with any of these steps, it's best to seek professional help from a qualified mechanic. Improper installation can lead to electrical problems or even damage to your vehicle's electrical system.
This is a general outline. Always refer to a repair manual specific to your 1987 Chevy truck before attempting this repair. The exact procedure can vary significantly depending on the model and specific details of your truck. This is not a simple job and mistakes can be costly. Proceed with caution and consider professional help if needed.
