[Scarsman]

When you jacked it up do the rear wheels spin freely? Can you feel any drag at all?

I would just point out that the rear pads are actually thinner than the front ones right from brand new. This is because the fronts do about 80% of the braking. So it is normal for the rears to look "more worn" than the fronts.

Calipers can stick, which will cause premature wear. Bad brake hoses can do the same thing. Try this:

Jack up the rear, truck in neutral. Spin wheels by hand and see if there is any drag. If they spin free, then start the truck and have someone apply the brake hard and then release. Now see if they still spins free.

If they drag after the brake had been applied and released then either the caliper or the hose is bad.

Now find the bleeder on the caliper. It looks sort of like a grease zerk. Crack it loose and see if it spurts brake fluid under high pressure. Watch your eyes! If it does, then the wheel should now be free, and you have a bad hose. If it doesn't, then your caliper is sticking. Could be the piston in the cylinder or the caliper not sliding freely in its mount.

Hope this helps! Usually if you have a bad hose or caliper it is just one. It is not common for two hoses or calipers to go bad at the same time. If you don't feel any drag when you jack it up, then I would guess you are just seeing the difference between front and rear pads.