This may be a silly question, but when I bought my Escalade the dealer only had 1 key and one FOB so I want to get an extra set made at the Dealership, for the price they charge for the transmitter it seems like a better deal to buy one on Ebay and just have them program it. The question I have is I've seen some being sold signifying #1 or #2 FOB, does it make a difference, how do I tell which one I have and if the dealer is going to program it anyway can I buy either one? Thanks