Originally Posted by BigBake

The 01's are some really odd cars. Because of the short production year and the new ZO6 parts coming out, you will find some irregularties. It is known that a very small percentage came with the LS6 blocks, and in 02 an even larger number came out with the LS6 block. It is not because they put more in, but the production year was longer on the 02's so more F-bods got the blocks.

Originally Posted by 1998Silverbird

So how can you tell if you have a LS6 block??