YA 3.4s are prone to leak at the LIM gasket. There is a fix, dont use the plastic gaskets. Gm has a TSB for this and the new ones hav metal on the gaskets instead of plastic.
Granted Gm or someone at Gm had to know this was an issue, but because its a discontinued model, GooD F***ing Luck!
Most likly The only ones who will get anything is the ones who lost thier engines because of the leak, and possibly the ones who hav had numerous LIM failures after the TSB was published
I've replaced several on my 99' SE, and hundreds on others pontiacs
