What coolant should I use
the one it says to use in your owners manual.
Originally came with Mopar green 3 year coolant, you can find an equivalent or better at the auto parts store.
G05 is the recommended coolant. All the major coolant manufacturers make this version. Some will have the spec right on the front label, Zerex for example. It’s a longer life coolant that is supposed to cause less wear in the cooling system.