2 way remote?

[07tahoe]

I have a '07 LTZ with factory remote start. I bought it used and was only given 1 key fob. I want to get the 2 way but I don't know if it had one to begin with. If it didn't, can I still program a 2 way to work with it?

 

[Fast55]

Yes, but it's expensive and the remotes are a little big for your pocket. Last I checked it was about $150.00 each and you must have the dealer program them.