All of the Rand McNally GPS allow you to add propane and how many bottles you are carrying. This is under the RV Tools on the Home Screen. First you need to select preferences to pick either car/light truck or RV. When you pick the RV icon you than go back and you can select the RV tools and enter all of your parameters for the RV including the number of Propane bottles and size. This information is than used to route you accordingly when you are in the RV mode. Such as low under passes and tunnels that will not allow propane or exceed bridge weight limits. There are also Check, Maintenance, Trails and Fuel list on the GPS that can be used.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67