Door Lock Module Needed to Add Aftermarket Alarm??
2009 Cobalt with p/w and p/l but no factory alarm.
I bout my car used and the dealer didn't have the key fob. So I figure that I add a car alarm w/ key less entry and truck release which is cheaper than adding a factory key fob. But some shops say that I need a door lock module ($80) which is used to by-pass the anti-theft and some shops say that I don't need a door look module.