Hi all.
My low coolant light came on, I look around and no external coolant leaks but smell.
Check the oil : oil cap & PCV are coated with white sludgy crap.
Guess where the the COOLANT went ... into the CRANKCASE via the lower intake manifold gasket.
Only 55k miles and very very disapointed of this piece of GM c***.
My last one.
Christophe.