Problem solved.

After replacing the front rotors and pads I was frustrated when I took it out to drive (in the parking lot). Still grinding. I thought it might have been the ABS system but either way I was so fed up with the whole thing I just drove over to my local shop and scheduled to bring in my truck for the next morning. Next afternoon I call the shop and it turns out that my right rear pad (piston side) had "slipped" out of the caliper. Sounds unbelievable but I saw the caliper and piston itself. Kind of makes me look like a novice because I didn't check the right rear, I checked the left rear though and all I saw was thin pads so I assumed that the other side was in decent shape also. The right rotor had deep grooves in it from the piston pushing straight against it, and of course the piston was pretty much toast also.

Moral of the story, check all corners of the truck when you canÆt figure something out. $400 later and I have new rear rotors, pads, right rear caliper and no more brake problems.

Some pointers for the front:
-Use an impact driver to get the small brass screws out, it works like a charm, otherwise, just drill them out and get new ones.
-Also, although common sense but when youÆre under the truck getting frustrated its not that apparent, turn the wheel to the left when working on the right brakes so that you can have more access to the bolts/pins on the back side, and vice-versa.
-When installing thicker pads youÆll probably have to push the piston back into the caliper. Use a large C-clamp and a big socket to fit inside the caliper. Be sure to watch the brake fluid reservoir because it could overflow. Use a clean towel to soak up the fluid to get it back down to ômaxö.

Thanks to everyone for their help.