2004 silverado - rear diff

[Nick1]

good!! Perfect!! I will kindly ask them to put it back together tomorow. I will pretend that I will save to buy a complete rear end from the dealer, I senced the same as you guys did! Sorry my english is not really good so!! Now i just hope they put it back together properly so It doesnt fail on me in the next 12 hours. The truck was runing fine, the only klonck sound was coming from my both u joints that were done.... meanwhile I will check to get new diff. and wait until winter goes away and swap them myself.

thanks for the help guys,
mean while if people can give me/give me links of use diffs for sale.
even maybe guide me on a book i should be ready before doing this swap...

2004 silverado z71, crew cab, 5.3l , 6 bolt, 3:73

Thank you!