My right rear brake was smoking, had my brakes, disc, calipers, flex hose replaced, on test drive brake still dragging and smoking, need some suggestions!

 

Mechanic did not finish the work. Flush entire system with 2 quarts of DOT4 fluid. Would be unusual for it to be any parts you have not mentioned, but the system also depends of the ABS modulator to act as electronic brake distribution, putting different power to front or back axles. In old days we had a proportioning valve.

So if a flush doesn't get out any trash, the ABS unit may need examination.

Pages from shop manual for your review are attached. Whole manual is called the RAVE, and is a free download.

 

Call the shop and have them pay to tow your truck back in and fix it.

 

Thank you for the great suggestions.