I'm going to have to take out my ignition tumbler? and have a locksmith rebuild. Key turns to on but won't go over to spin starter. Also turns off after I jump starter with screwdriver. Bought a push button starter switch for now($5 bucks). Does it matter which wire goes to which on solenoid because button switch has no + or -. Hate to burn up something. Thanks.

Have you checked the plastic electrical part on the back of the switch?

ditto, the switch at the bottom of the key cylinder has caused many of us problems.

It is a $20 part.

This is better than Google or having to call Dad, whose a Chevy Man. Thank You.

If you need to test your switch, I made this up a few years back. It shows where the continuity should be with the key in the various positions:

Will that plastic part on back of the switch allow the key to turn to start and not let the key come out in any position? Curious as to whether those little inside parts need replacing or if the plastic part will cure my ignition problem. I would like to keep original key also. Locksmith?

If you're referring to the actual switch that was posted above by Yugo, no, that won't affect when the key is able to be pulled out.