I just went through this....there are 2 part numbers for each line depending on which fittings were used on your truck (one number has more protrusion into the fitting than the other). Best thing to do is have a dealer run your VIN unless you know which type of fitting was used on your truck. There may also be a color difference on the plastic that covers the retention clip, but I am not sure about that...
This was for an '03. My plastic covers are black, and I used the long protrusion.