Well, I came across a Directed remote start that was $60, but on clearance for $15. It basically comes w/ everything to DIY and 1 remote. I currently have a 2004 Tahoe w/ factory alarm and remote unlock. Is it possible to add the remote start, but retain the factory alarm / unlock? I don't care if I have to have 2 remotes, since I will probably only use the remote start in the winter.