Sort of...! It's complicated.
Your 2000 LS1 was used in other GM vehicles around the same time frame..
But your LS1 differs greatly from the small block Chevy of years ago.
It's actually 346 cu in, (I think) vs 350 of the olden days.
Yours is a Gen III engine, replaced with a Gen IV in 2005.
They changed many things during that time,bore,stroke, head design,etc.
Graham