Well fellows, i guess this is it for me.
After replacing the radiator-coolant sensor and flushing system. I drove the
century around for a couple of days. Even drove it on a 400 mile trip.
Well i checked the fluids and noticed no water/antifreeze in radiator?
then i checked the oil and the oil was almost coming out of the dipstick holder.
So i drained the oil and it filled the oil pan. Whick normally holds enough oil for two oil changes.
Looks like i have a bad head gasket or cracked head!
This is it for me. Im putting a 500.00 for sale sign on the buick and moving on.
Personally what a piece of JUNK! Nothing but troubles from the day my dad
bought the car new!
AND GM WONDERS WHY THE SUCK!

If you live in texas and want the car shoot me a email. the car looks brand new. It has new radiator-cooling sensor-alternator-tires-power steering rack-pump. Tune up and more.
thanks for the all the info.. god bless and good luck with all your gm products.