[camcojb]

Originally Posted by Steve1968LS2

I bet it largely has to do with internal shapes withing the tank. I have seen "squared" tanks before.

So long at the internal baffleing is correct does it really matter what the outside of the tank looks like?

I would agree, except that I'm sure GM could have figured it also. I think the shape is more important than we know, not just being baffled. I think there's some physics involved here too.

I guess technically you could have a circular tank inside a square shape, but I think the circular part is important.

Jody