I am in the same boat with a 98-GC 5.9 4x4 with front shaft MIA.

it has the CV on the axle end but a regular double u-joint on the xfer side.

I see a few of them with CV on both ends in those newer ones like you have.

take a look at both yokes to see what it needs.

I see replacements on e-bay in the 400-500 price range. but can find anything on how long or how to measure.

cant find it with only one cv end either?? I find the replacement CV but no shafts.

so you say they measure the tube and not the spline ends?

I look into the proshaft seller.