Sludge and coolant in oil
My car is getting coolant in the oil. Could it be a cracked freeze plug? on 1993 Pontiac Grand Am
No, not a freeze plug. More likely to be a leaking head gasket or intake manifold allowing coolant into the oil. You may want to find a GM specialist. Here's a directory link for you:
a cracked head gasket
just to add to bobs answer, we have seen many come in with bad intake gaskets leaking coolant into the oil. you can add dye to the coolant and when it shows up in the oil, the intake can be examined for the leak.