I believe have another issue and welcome input. Our 1994 K2500 Suburban with about 150K miles had too much fluid in the oil pan (about 1-quart over the full line) and started to blow white smoke. The coolant was low and the car alarmed. It had sat for about 6-months when all of this was realized.

What to do considering coolant in the oil? The dealership "guessed" a failed head gasket and quoted $2,300 repair. What about internal damage due to the coolant?

The vehicle is good shape. I planning to loan it out as a school car for my son who just graduated.

Thanks in advance.