2001 rcsb 2wd 4.8 silverado

Having trouble finding the right part numbers. Rockauto has 900 choices and isn't very clear what's what.

How do I know if I have deep or regular pan? Some of the parts say 4l80 or l60, but then other descriptions just say 4 spd, which could be any of them. Other parts descriptions don't say anything.

Autozone, advance, and gm parts direct aren't any help either.

 

You should have the factory deep pan on your truck with a 4l60E.