What is a new good alarm system for a 2007 GMC Sierra? I have factory remote start, and if possible I would like to retain that. I would also like to get a system that has some sort of proximity sensor. Do yall have any good ideas?

 

i am real happy with my viper alarm system. i know they have one that adds remote start to the factory keyless but i dont know about the other way around. check thier website.