Does. The 07 siera have to re program the key when changing the ignition lock cylinder

What is your question?

I changed the ignition lock cylinder. Ignition switch. And theft module located where the key goes into the lick cylinder My truck don't. Turn over and i notice. My security light stays on. While i do the unsuccesfull relearn process Also. When my key is removed. The security light does NOT. Cone on or flash. It diesnt come on even with the doors closed and locked But as soon as i place the key in the ignition. And put it in the on position it comes on and STAYS. On