I have a 2012 Dbl Cab and was told by the service techs it has a Factory alarm however it doesn't seem to work, they even said that the increased the sensitivity setting from 2 to 4 on the shock sensor, so when I got home, I locked the truck with my factory fob, stood in the bed of my truck and jumped up and down several times like an idiot and nothing... no horn or lights flashing. Also when I lock it with the fob (with the window down) I'll reach in and unlock/open the door and again, nothing? When I explained this to the service advisor at the dealership, he told me that the alarm will sound the horn if someone forces the door open without unlocking it (unlocking the door will turn off the alarm), so I'm guessing someone has to literally rip the door off to get the horn the alarm to sound???
Is this how the factory alarm really works or has it been disabled? Do I have to have a tech connect a computer to the main harness and enabled on the main computer?