Center support bearing removal and installation?

Good morning,

Did you call the GM parts department and ask them about the bearing? that is where I would start.

I attached a list from rock auto and the largest is 40 mm.

https://www.rockauto.com/en/catalog/chevrolet,2000,silverado+1500,4.3l+v6,1358793,drivetrain,drive+shaft+center+support,12743

did you have to press off the old bearing? Is there a part number on the old bearing?

Roy