Here's a general outline, but remember this is *not* a substitute for a proper repair manual:
1. Disconnect the Battery: This is crucial to prevent accidental shorts and damage to the electrical system.
2. Steering Wheel Lock: Make sure the steering wheel is not locked. If it is, gently wiggle the steering wheel while trying to turn the key.
3. Remove the Steering Column Shroud (Bezel): This plastic or metal cover surrounds the steering column. There are usually screws holding it in place. You might need a small screwdriver and possibly some patience to carefully pry it off without breaking it.
4. Access the Ignition Switch: Once the shroud is removed, you should have access to the ignition switch itself. It's usually located behind the steering wheel.
5. Remove the Ignition Switch: This is the trickiest part. There's typically a retaining clip or screw holding the ignition switch in place. You might need special tools like a small screwdriver, ignition switch removal tool, or even a pick to carefully release the retaining mechanism. This is where a repair manual is invaluable, as the method varies depending on the exact model and switch design.
6. Remove the Key Cylinder: Once the ignition switch is removed, the key cylinder should be fairly easy to remove. It may have a small retaining clip or screw that needs to be removed before you can pull the cylinder out.
Important Considerations:
* Wiring: Be extremely careful not to damage any wiring connected to the ignition switch. Take pictures or make notes before disconnecting anything.
* Tools: You'll likely need small screwdrivers (Phillips and/or flathead), possibly a retaining clip removal tool, and possibly a pick.
* Replacement: If you're replacing the key cylinder, make sure you get the correct replacement part for your 1978 Chevy Malibu. The wrong part won't fit.
* Professional Help: If you're uncomfortable working on your car's electrical system or are not mechanically inclined, it's best to take your car to a qualified mechanic. Improperly removing or installing the ignition switch can damage your car's electrical system.
This is a complex procedure with many variations depending on the specific model and condition of your vehicle. Again, using a repair manual is strongly advised. You can usually find these manuals online (eBay, Amazon) or at auto parts stores. A Haynes or Chilton manual for your vehicle will be helpful.
