$600 for a "dedicated truck-trailer" version, complete. Costs more if you want the fleet version & will be changing tractor/trailer hookups often. I don't really know the differences, but will ask local dealer again.

We've hauled quite a few bus w/factory trailer/cab gauges & I disagree that you can read the load on them to within 2% of gw#. We've got 3 tractors w/air bags, I'm sure only 1 (IH) has cab readout. But, that's a "here" thing & I acknowledge we're not as good as many others at a lot of things.

So-you guys that have these type gauge/computers (it does computations) say it doesn't work any better than the air gauge hanging under the trailer @ ciphering g.w.?