drive line on 2006 Chevrolet Silverado 3500

i was wondering if anybody had a drive line schematic had a auto repair place redo some u joints and i think he put in a new bearing at where the 2 drive lines meet it doesnt look right the bearing and the rubber gasket or whatever it is is ruined and it looks like when i get under the truck it is missing something in that area where the 2 drivelines meet

I don't have a picture for you but here are some online resources you may try:
Here are two online sources for you:
For AllData:
Here's the one for Mitchell as well:
If you can't figure it out, find a GM specialist or truck shop for some assistance.
If you want to find a GM specialist, here's our directory link for you: