I have also had a similar problem with my 97 3500 when I bought it. In the morning, the rear brakes would lockup with the slightest touch of the pedal. I fixed this problem by replacing the rear brake cylinders, about fifty bucks, turned the drums, and put a new set of brake shoes. This should take care of the problem you are having. Aaahhh before I forget, bleed the brakes on all four corners too!
Hope this helps,
Richard
Sorry, posted reply in wrong place!!

Richard
Sorry, posted reply in wrong place!!
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