Here's a general procedure, but you should consult a repair manual specific to your 1965 Chevy pickup model for detailed diagrams and instructions:
1. Steering Wheel Removal (May Be Necessary): In some cases, the ignition switch is located behind the steering wheel and access requires its removal. This is a multi-step process usually involving removing the horn button, the steering wheel nut, and carefully pulling the wheel off the steering column. Consult a repair manual for the correct procedure to avoid damaging the steering column or air bag (if equipped, though unlikely on a '65).
2. Column Cover Removal: Once you have access to the steering column (either directly or after removing the steering wheel), remove the column cover or shroud. This is typically held on by screws or clips.
3. Wiring Harness Disconnection: Carefully disconnect the wiring harness connected to the ignition switch. Take pictures or make notes of the wire colors and their positions before disconnecting to ensure you reconnect them correctly later. A wiring diagram from a repair manual will be extremely helpful here.
4. Switch Removal: The ignition switch itself is usually held in place by one or more screws or a retaining clip. Locate these fasteners and carefully remove them. The switch should then be able to be pulled out of the steering column.
5. Ignition Switch Housing Removal (Sometimes): In some models, the ignition switch may be a part of a larger housing assembly which needs to be removed before the switch can come out.
Important Considerations:
* Repair Manual: A factory service manual or a Haynes/Chilton repair manual for your specific year and model of Chevy pickup is invaluable. These manuals provide detailed diagrams and instructions that are much more reliable than general advice.
* Tools: You'll likely need various tools, including screwdrivers (Phillips and flathead), possibly a socket wrench set, and possibly a steering wheel puller.
* Caution: Be gentle when working around the steering column. Avoid using excessive force to prevent damage.
* Wiring: Pay close attention to the wiring. Incorrect reconnection can cause electrical problems or damage your vehicle.
If you're uncomfortable performing this repair yourself, it's best to take your truck to a qualified mechanic. Incorrectly removing or reinstalling the ignition switch can lead to serious problems.