Just be honest with them... You wont get more "Money" just because you tell them the car is a GN.... I had to do an INS claim on my car. Its a Turbo Limited... They thought it was just a bone stock Regal.. I just had to explain to them that it was a Regal with the special "T" package.. When they look it up, the 3.8L Turbo Package came up, and they notice the Huge difference (price wise) between both cars.. You might have to do a little leg work, might have to send them some Blue book values, ech... but its pointless to claim something you DO NOT have.... you wouldnt get more money for one car or the other(GN vs T-TYPE).... good luck..