1/2 ton ... that looks like the part but I just need the line that runs to it from the dist block. I got a kit that I'm going to check to see if it contains the right hose.Looks like this: https://www.rockauto.com/en/moreinfo.php?pk=1416050&cc=1424191&pt=679&jsn=939&jsn=939 ABS Modulator Valve
The other choice does not look the same and if is the other choice you would have a JL4 RPO code. That would mean you have active brake control and would likely have the master cylinder with a spout out the front of it. Mine has all that with the hydro-boost system.
Is your rig a 1/2 ton or 3/4 ton?