Depending on the age if the unit you have now, you might be able to just buy a new LCD remote and learn it to your current unit, then you buy another complete new unit and install it on the second vehicle and cross learn the remotes for the 2 vehicle operation. If you current unit is to old to accept the LCD remote, then yes, two new units will be required.....Ok, thank you. So essentially if I want to run two vehicles off one remote I am going to have to get a new unit installed in each vehicle to pair with the LCD remote?