Theft/Security and MIL light on and no start now.

[Jeff_383]

I changed my steering column on my 08 silverado, using my old wiring harness and ignition switch/key/ignition module from my old column. Now that I did that, and tried to perform a security relearn, it won't start. I thought since using the original key/switch it wouldn't think I was tampering with the passkey feature. I'm lost on what the heck to do. Do I need a dealer or buck up and buy HP tuners or what?

[farmtruc]

Try performing a security relearn.

[kyhunter89]

and tried to perform a security relearn, it won't start.

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[Jeff_383]

Found it. I'm an idiot. I took off the column cover and found I forgot to plug in the little connector to the ignition switch. Starts much better now.