What's the 2015 ram 1500 coolant type?

The 2015 Ram 1500 (by Dodge, though they've removed that branding) is going to use so called "Orange" color coolant. Really, any hybrid organic additive technology (HOAT) one will do, and You can use the ACDelco DEX-Cool brand, or go with the Mopar Antifreeze/Coolant 5 Year/100,000 Mile Forumula (MS-9769), which is the sanctioned OEM one. If You find that You're needing to constantly top off the coolant, You should inspect Your radiator for leaks, as well as Your hoses. If You smell a sweet burning smell (that is, it smells kind of perfume-y) then this could be a sign that Your head gaskets are or have failed; You're in for some expensive repairs, in that case.