[kevinb70]

the upper intake gasket is completely dry - there is no coolant passages going thru it.

the lower - look for seepage along the "V" on each side of the engine. if the gasket is cracked on the outside only its possible to only get an external leak.... for now. from what i recall there was also an issue with improper factory assembly - either improper torque or no 'loctite' compound used so the intake bolts eventually come loose.

my thread on replacing the lower and head gasket is on these forums with pics and narrative..
for those who didnt know, we 'won' the class action suit against chevrolet but the time to collect from that is long gone. I think the lawyers acted poorly in only getting their 'cut' of the money, i think the suit should have made it mandatory for chevy to NOTIFY all owners of this defect. There are still lumi owners who didnt know and will eventually lose their engine when the gasket fails. My lumi is still running SWEEET been nearly a year since I fixed it.