Ok chevy people, let me ask you a question and see if yall can answer it.
What is the difference between 2002 and 2003 model chevy 2500HD's brake master cylinders? Looking at pictures online, they look almost identical, and have the same bore size. Is it something like the bolt hole spacing or brake line threads? The hydroboost units have different part numbers too, but also look the same.
Long story short, I am modding the front 1 ton axle for my jeep to use the calipers from that year range truck, and the rear axle uses calipers virtually identical to what would be on the rear of those trucks. Since I am already running a chevy hydroboost, I figured it would be best to run a MC from the same year range truck the calipers came from.
It looks like one year range is like 99-02, then next is 03-07. While the calipers are the same from 99-10. So I cant figure out the difference. Anyone have any idea?