Changed out another brake line today on the Silverado. Actually paid my mechanic to do it.
This was the line that runs from the ABS box to the rear splitter for the rear brakes.
It had two holes in it - very small - but enough to leak brake fluid.
The holes:
The old line after removal:
We used one of the pre-fabbed stainless steel lines that came in the kit I bought back in 2018, like this one, which is for the axle:
The other two lines I previously replaced (MC) I used the NiCop line on. I still have both front wheel lines and the rear axle line left to replace at some point but for now no leaks and a firm pedal!