V6 Failure of Lower Intake Manifold Gaskets

I'm trying to find out which Chev/Buick V6 engines don't have this gasket problem and starting in what year.
Does anyone have this info or can steer me to a site that does?

3.1, 3.4 from about 96 to end of the run, 3.8 from about 98 to 2005.

Thanks for your reply.
I'm surprised GM didn't eventually redesign the gaskets to fix the problem.

They did several times but it seems some updates still were ineffective. On the 3.8 the aluminum frame gaskets by Fel Pro did the job.