So I heard some metal on metal action from the rear of my 98 K1500 Suburban this Saturday and on Sunday pulled the rear wheels to have a look. The passenger side had about 50% of the lining left. On the drivers side, the leading shoe lining was 3/16th above the rivets while the lagging shoe lining was gone and the rivets were throughly decapitated. Both wheel cylinders were replaced when the rear shoes were replaced last. The brake fluid was replaced and the system flushed last year. I have not experienced any braking issues since the fluid was changed. I had previously had issues with the antilock brakes activating in situations where it was not necessary. The fresh fluid corrected this. Does anyone have an opinion as to what might have caused such a dramatic difference in wear pattern? Gas mileage has been normal - around 16 mpg on the interstate. I would have expected much lower if I was riding around with the rear brakes applied on one side.