Getting solid security light on and off at times past few months, once it stopped me from starting car, seems to be getting worse. How do I go about disabling this issue?

this is one way, it outputs a square wave that is the same as the tdm output to the pcm. so you wire this to the pcm input and the pcm will always think its happy. i dont know if yours is one but im guessing by the way you said it that there is a starter disable too that will have to be bypassed.
GM VATS Bypass Module For LS1 and LT1 GM VATS Bypass Module For LS1 and LT1 [gmvats] - $24.95 : 3rdBrakeFlasher, E-commerce web site

Well I tried reading the resistance on the key and well, it'* not there from what I'm seeing. 20k ohm check, no go. I'm gonna call the locksmith down the road tomorrow since I'm betting I need a key (and only ever had one, I never lose keys so thought no reason to get a 2nd) hopefully he can figure out which of 15 resistances it is and make a key. I'd rather get a key and keep driving then start screwing with wiring...

A GM dealership should be able to tell you which resistor value your key uses based on the VIN if the locksmith can't figure it out.

Figured it out this morning, new key cut...within seconds of driving it with new key, security light went back off! You should see the contact difference in the new chip vs old, the metal was so worn down on the old passkey chip it simply must not have been touching.

I'd like to see pics if you can get them.

Here you go:



See the closest one? That'* new. You can see the entire piece of metal is missing off the old from years and years of wear.

Holy cow! That is worn down!!! Thank you for posting a comparison pic.

No problem, and no more security light! Easy fix ftw!

Glad you got it fixed, and thanks for the update.