3.73 w/ G80 is pretty common. Sorry!
Where yours would be 'rare' is if you had a 'North Face' package, or if you had the two-tone paint / cladding, etc. (on the second one, it wasn't *that* rare, but the years have claimed many of the early ones that had it (all were TBs, AFAIK)).
Where yours *is* kind of rare (and not in a good way) is that GM made 'under the surface' revisions to the vehicle for 2003, making the '02s a bit of a red-haired stepchild, compared to the rest of the run. Search our threads & elsewhere for the info. Also, download the service manuals and compare wiring schematics for the '02s vs the '03s-onward.