Truck is a 96 dakota v6 4x4. I cannot get the brakes to bleed. I've tried everything and there's still a little bit of air in the. It is only barley noticable when the truck is off, but when its on the pedal will got to the floor. New parts include master cyl, both front calipers (yes they are right side up), and all new lines. There are no leaks anywhere, wheel cyl, cal, master cyl, connections, all dry. Every wheel has had at least a bottle of fluid cycled through it. I've tried vacuum bleeding but its useless. I tried tapping while bleeding, tried gravity bleeding, then bleeding with the truck on. Out of ideas.
The truck does have Rear ABS, however the manual says there is no special procedure for bleeding the ABS, just do it like normal. The little bit of air just wont come out.

 

Sounds like you have a clog. Open up each line and clear it out with an air compressor.

 

Do you get a good steady flow of fluid at each wheel when you bleed? I don't know your manual bleeding procedure but if not done right it can be easy to suck air back in.

It is important to not allow the flow of fluid stop before you close the bleeder valve. When I do it I have someone press on the brakes then ill quickly open the valve and close it again right away, before the flow of fluid stops. This will help prevent air from sucking back into the system if you close the bleeder while the lines are still pressurized.