Most likely lower intake gaskets. Dexcool has nothing to do with the problem, the problem is the old design gaskets were plastic and the heat cycles would crack them. New GM gaskets are metal.

 

Have your intake pressure checked, that will tell you whether your intake gasket is leaking or not. It's likely your valve cover gaskets...and for $100, I'd let someone else do it.

Mine leak too...I just haven't gotten around to fixing them yet.




Not quite true. The gasket material GM used was not compatible with the Dexcool and this combination caused the gaskets to break down and fail.

 

Could be a valve cover gasket.
None the less let the extended warranty fix it.
Oil leak should be cut and dry for the warranty.

Nice car and should be good for another 200K.

 

I should have made things clear, the warranty has a 100 deductable, valve cover gasket is trival, for 100 I will fix that, Lower intake is more work than I wish to tackle in the winter

Rod

 

welli got a 38 v6 series 2.in my monte ss supercharged.....had the intakes done....now I got oil leak...looks like pan or rear seal.....valve covers seem ok as is oil sender.......so lets take bets....1 oil pan...2 rear main????

by the way gm has gone down hill....no more quality work....cheap ideas...costing us thousands////////