Pretty sure you have rear ABS, as I do (rear only). Contact Dodge here
and ask for a build sheet. Have the last 8 of your VIN available, their list of factory hardware will confirm how your truck left the lot.
Check the ABS fuse, first. You may also have a broken wire going to the sensor(s). It's not a lot of help, but it gets you started.
Edit: Seeing so many different ABS codes in research, I realize the solution is not likely the fuse. I'm not well enough versed in the brakes to help. Others with much more experience will chime in before too long.