you have a 2010 LTZ they no longer have projector lamps as they did in the 2009 LTZ. If you are going to install true HID lights I would suggest buying the 09 headlight as well. You should be able to find them off ebay, you could sell your 2010 lights and it shouldnt cost you too much.
If you install HID in a non projector headlight it will blind on coming traffic as the light scatters all over the place. If you have the 09 LTZ light you will have no problem with regard to breaking any laws or pasing any tests. :cheers: