I recently flushed my radiator on my 03 Sivlerado 5.3 V8. Is there any way to test theCoolant and see if the correct water and dexcool mixture has been achieved? I flushed the system with water for quite some time and then added 2 gallons of Dexcool and toped off with water. I assume that some water was held in the block and I am ok, but being somwhat of a perfectionist I would like to test it if possible.

 

In your owners manual it will list the Cooling System Capacity of your truck which should be 14.9 quarts.

If your cooling system capacity is almost 4 gallons (which it is) and you added 2 gallons of antifreeze and the rest water then you are OK as you want the concentration to be 50 to 67%.


There are test strips that you can get at the local parts house that will work with Dexcool if you really want to be certain.

Dave