how do I get my doors to close easily instead of having to slam them

[G-NUT]

How do I get my doors to close easily instead of having to slam them? It's a crew cab. My front doors take a great deal of force to actually latch completely while the back doors don't take as much but still have to shut pretty hard.

The doors close easily but unless I slam them they only single latch, not close/latch all the way.

I have replaced the hinge pins on both front doors and replaced the striker bolt on all 4 doors. No difference.

I've seen some of these trucks where you can easily shut the door with normal force and it actually latch all the way.