Question about 1999 Chevrolet Silverado 1500
No radiator cap has overflow tank
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Posted on Jan 02, 2017
SOURCE: how do i flush a radiator
you could try to pull off the bottom hose and run a hose through it till it runs clean then replace the hose fill the radiator half full start the car let it run for a min. or two then do it again untill all the gunk comes out then put antifreeze and half water
Posted on Jun 18, 2008
It is more likley that is not rust. The coolant GM uses is called Dexcool, Dexcool has had a reputation of causing a sludge that appears to be rust in the cooling system. I could get into the chemical break down, but there isn't enough room to explain. The main cause to this, is lack of maint. over time the coolant will build a charge of electricity called electrolisys, this is what causes what you are more than likely seeing. The correct way to eliminate this (if it isn't too bad) is to go to your local repair shop, and ask if they offer the BG cooling system flush w/ additive. If they do, go ahead and have them do it. If it is pretty bad have repeated after about 6000 miles. You may also find more info on the dexcool and its effects here http://www.vnnforum.com/showthread.php?p=994256
Posted on Oct 07, 2009
It's located on the drivers side of the radiator opposite of the lower radiator hose. Note: you may be better off disconnecting the lower radiator hose, it's common for the drain plug to break or the O-rings to split causing more work to drain the radiator. That's why most tech's will drain the radiator from the lower radiator hose, less chance of breaking the radiator drain plug and most new cars now don't come with a drain plug to the radiator.
Posted on Mar 05, 2010
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