Originally Posted by jerkyboy
Changed my oil last week, here's the leak, definitely coming from the back of the engine. Dropped it off at the dealer today and met with the mechanic who's going to do the repair. He's a 30 year vet and told me he has seen it before but it's not common, said there's a plate on the back of the engine and that sometimes the gasket between the plate and the engine goes bad. I'll post again when I get it back.
So it’s your engine oil cooler has a leak
GM Part : 12649227 COOLER, Engine Oil Cooler, COOLER,ENGINE OIL(INCLUDES 411-414,416-423,428,430,463) $274.69
It’s probably this
GM Part :97192667
GASKET, ENGINE OIL COOLER ADAPTER(ADAPTER TO BLOCK)(FLYWHEEL HOUSING SIDE)(1.550)