Here’s the link...
https://nemigaparts.com/cat_spares/epc/chevrolet/
Once you select the model, it was in group 17.
Here’s another diagram from that group which looks to show the two-piece better. The model codes are in the center column. K107 is a 4wd short wheelbase. The (06) would be a four door utility, so K107(06) is a 4WD four door Tahoe.
A 109 would be a long wheelbase, so a K109(06) would be a long wheelbase four door utility (Suburban).
A 105(16) would be a two door Tahoe.
I don’t think you can actually buy anything from that site, but it’s good for getting the original part numbers.