1999 GMC Suburban OIL PUMP

There's nothing down there-sounds more like a blown headgasket, cracked head or block, intake manifold leak-Get it block and pressure tested to find where its leaking

Subject: Oil Leaking into RADIATOR? Quote message
I have drained radiator after running with cleaner in system, drained & filled with clean water. Ran truck got 20 min or so & then drained, refilled and back flushed cooling system for 15 - 30 minutes, then filled up system with anti-freeze & water. Oil appeared in cooling system again. Repeated whole procedure again next day. Again there appears to be oil in cooling system. When system hot radiator content appears creamy yellowish & thick. When system is cold, the oil appears to be in form of large yellowish globules. There is no apparent water in engine, I checked the dipstick & the fluid on it does not appear milky, just normal oil. I do not think the head gaskets are blown, but could they be bad and be letting engine or tranny fluid somehow get into the radiator? I am stumped. Kenn

Check the transmission fluid if its pinkish color if not-your best bet here is get it pressure tested. You're leaking somewhere could be one of the few I've mentioned earlier-hard to say