Welcome to the site, we will try to assist you. From about 1989 thru the present time, camaros with the 5.0 and 5.7 liter engines came equipped with the VAT system. There are 15 different resistor codes that GM used to code these keys. Couple of questions to help us get started here. 1. are you the original owner? 2.before you misplaced (I like that word better than lost) your keys, did you get a security light for about 3 seconds when you started your car. It is located to the left of the check engine soon light.
Now if you are the original owner, there should be key codes on the paper work that you received from the dealer. You can check to see if your ignition has the vats by looking under the dash at the steering column for two wires hooked to a connector. One wire is colored black and white, the other is yellow and purple. They usually have a heat shrink insulation that is colored black or orange. I would also look in my center console for the RPO codes, it is a label mounted on the passenger side of the console. The code for the VAT system is UA6. Mine is an '89 Iroc with the VAT system, however RPO UA6 is not listed on my sheet since it is included as part of a package 4 RPO. However, give your RPO codes to the service or parts department and have them look it up. I have sometimes found it easier to deal with the parts department rather than the service department on some issues. Besides, they have access to the illustrated break-down of your car. Hope this helps you some!!!!!!!!!!!