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Q: Oil in the radiator on 2001 GMC Jimmy

My sons 2001 GMC Jimmy was overheating when he got home the other day. I let it cool down and then I checked the coolant level in the radiator and I noticed engine oil in the radiator. I checked the oil dipstick and there was none showing on it. I thought blown headgasket or worst case cracked head or block. How can you tell if it's a blown headgasket rather than a cracked head or a cracked block?
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There is know way that I know of to tell the difference between a blown head gasket or cracked engine block or cylinder head without pulling the head(s) for inspection. There should be no pressurized oil flowing between the engine block or in the cylinder head of this type of engine. The oil is pumped to the valve train via the push rods. Does your Jimmy have an in-radiator engine oil cooler?
No, it doesn't have a in-radiator engine oil cooler. I took it to a shop and they want to just sell me a used engine installed for around $4,000. I knew it either had a blown headgasket, cracked block or a cracked head. They charged me $80 to tell me that which I already knew. Should I take it to another shop and get another opinion? It's not worth spending $4,000 for another engine for this particular vehicle. I don't have a clue what to do with it now. Any help would be appreciated.
It looks as if you have two repair options. 1 replace the engine. 2 remove the cylinder heads to see exactly what is wrong and make a decision at that point what to do next. According to the RepairPal estimator, replacement of the head gaskets ONLY should be in the $700 to $900 range. If that is all that is wrong are you willing to spend that much? As I said before, it would be very uncommon to see oil in the coolant due to a blown head gasket so I would suspect there is something more wrong which will add to the repair bill, over and above the head gasket price. How much are you willing to spend on this vehicle?
I am afraid that may not be enough. But there is no way to tell for sure until the exact cause of the "oil in the radiator" is found.
I'm not sure if it's really worth putting that much into it anyway. Maybe I will just drive it into the lake and watch it sink! hahahah j/k Thanks for all your help.
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