GMC uses the radiator to cool engine oil in some applications. IF you have engine oil in the coolant then the oil cooler has failed. you need to get this fixed as soon as possible. The oil will mix with the coolant and become a thick gooey mess that WILL NOT circulate in the cooling system and cause severe engine damage.
There has been a problem with the Dex cool orange antifreeze deteriorating the upper and lower intake manifold gaskets, causing coolant to leak in to engine.If there is antifreeze in your oil, it will ruin your engine. If you find antifreeze in the oil it will cause the oil to become thick and frothy and will not lubricate the bearings and other moving parts, causing an engine failure. If there is evidence of coolant in the oil, do not drive the vehicle. Have it towed to a repair shop and have the gaskets replaced, oil and filter changed, cooling system flushed and refilled with GREEN antifreeze that is compatible with aluminum radiators and engine parts.
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you checked the radiator and it has fluid in it ?Are you seeing an oil leak ? Tell me about the radiator then tell me about the leak . You question is not clear .
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