Thread: Viper 5901 and stock alarm

You don't have to. But if you don't, and you lock your car with your factory fob and unlock it with the aftermarket one, it will go off. You can unlock your car with the factory fob and put it away and not use it anymore. Then you don't need to tie in the factory alarm disable

You can have the 5901 disarm the system. I think the sticky I found was on cgp abotu it.