Since when does the 3800 have HG issues? Very few people have ever popped one. LIM gaskets is still in court for GM...it was a known failure that killed many engines...3100, 3400, and 3800 included. But the LIM design on the 3100/3400 was conducive to head gasket death and destruction of the engine. I replaced 4 3100/3400 this summer due to this issue. I replaced one 3800 and that was due to bad cam bearings.