How can I identify my anti-lock brakes?
#11
Dude, it's simple and I can't believe no one has said this yet.
Look under the hood where your brakelines come out of the master cylinder. They lead to the ABS module. If you only have 2 lines coming out of the module going under the body of the truck, then you only have rear ABS. If you have 4 lines, then you have full abs.