At the front, the 2019 1500, codenamed DT, gets a more modern, sophisticated look with a refined grille that boasts a massive vertical bar and a skinner horizontal slot. The headlights are slimmer than the current model's square-like units and feature modern LED lamps. The lower end of the front fascia also has slim lighting elements that could be used for fog lights, along with an off-colored skid plate. The hood continues to sport the same bulge as the current model's, but is shaped like a pyramid instead of a massive rectangle.
It looks like Ram took a page out of Ford's design book at the back with a rugged design that imitates the 2017 F-150. The taillights, while retaining the same overall shape, have an unlit section that would most likely be used for the reverse lights and turn signals. With the front end benefiting from LED lamps, the rear taillights would probably get LED units, as well.
With Ram still testing new configurations of the 1500 and a document revealing FCA's future products, we expect the next-gen 1500 to come out in the near future as a 2019 model year.