Other than some "engineer" trying to validate his existence, I wonder what the point of changing the bolt pattern was? Something tried and true that works, imo leave it alone!!
GM had been using the same 14 bolt full floater since 1973, and now it's gone. Even the 11.5" AAM axle in my 03 Duramax had the same pattern as the 14 bolt.
The Express 2500 still runs a 16" wheel in the old school 6.5" pattern. I service a fleet of GM vans at my shop and darn near every 2500 runs the same 16" steel wheel... and these vans range in year from 2002 to 2019.