Bought a 2006 f350 drw 6.0 and just found out it has a dealer installed aftermarket alarm, the truck was originally purchased from Berge Ford in Mesa AZ but due to privacy policy they can't tell me any thing about what kind of alarm was installed or even what kind of alarms they install generally.
Any ideas on what kind it could be and more importantly how to reset it/ remove it?

 

I don't like messing with alarms, though I know some people have to have them. The only thing I can tell you is go over the truck with a fine tooth comb, and try to find the box. It's usually pretty easy to spot any non-stock wiring.