We replaced ignition switch
 

We replace the ignition switch and now there's a light on the dashboard with a line through it and the jeep won't start. Is there a pass lock disarming procedure than anyone knows it's an O2 Jeep Grand Cherokee.

Welcome to CF!

You have a vehicle with a security key module that will only allow a start with a key it recognizes. Your new key must be programmed to the code the module recognizes. Now that you've changed the key tumbler, it has to be programmed by the dealer.