If your truck looks like the truck on the left then your truck is the Ram 1500 Classic Body style and shares all the components with the 2018 Ram 1500 as well as the earlier Ram 1500's.
If your truck looks like the truck on the right then your truck is the 2019 New Body Style Ram 1500 and you need the kits designated to fit the 2019 and newer Ram 1500's