Well it has been only 1,700 miles on my blazer since I bought it a month ago. The engine compartment sounds like it has a bathtub inside of it swishing from side to side. Looked up on the search, told me to check out the antifreeze and said it could be fixed by putting some antifreeze directly in the radiator. Checked the antifreeze. What antifreeze?[&:] The plastic antifreeze holder was empty. Now the swishing sound had been going on since I came back from a trip(over 300 miles). I had a new ac compressor put in and I am guessing the guys at the shop didn't refill my antifreeze to the level they found it. I have been checking for days and can find no leakage anywhere. I am about 100 percent sure its not head gasket or the tank should have had some bubbles. Also no visible hose leakage. When i filled the antifreeze up it had some antifreeze in the radiator just none in the tank. . Blazer still runs smooth though just wish I could get rid of the water sound.Help me so I don't have to go back to the repair shop.

 

If you can't find any leaks in the engine compartment ot under the truck, look under the carpet on the passenger side front floor.
It's possible to have a leaking heater core and not see the coolant outside. Chances are that if the heater core is leaking you might smell a sweet smell inside the truck. Also sometime you would notice the inside of the windshield fog up temporarily when you first start the truck in the morning.
Make sure the radiator is full, in the morning , when it's cold and the plastic over flow tank is filled to the "full cold" mark.


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Well it was the waterpump. Had it fixed for $142 for a new pump and labor. Decided to go out all at once.[:'(]

 

Glad you got it fixed! Not a pad price either.