Valve Cover Gaskets
I seem to have an oil leak coming from around the front valve cover. I inquired at Auto Zone about a gasket set and, according to their system, the valve cover gaskets are different between the */C and non-*/C engines. The price was quite a bit different too. I checked gmpartsdirect and if I read that right it doesn't matter which engine, but that part no. 12576033 is what I need.
Are the valve covers different between the two engines?
As a side note, AZ already messed me up with their system when I replaced the radiator on the bonneville last month.