How much Dex Cool do I need to buy?

[jls8177]

I am getting ready to change my coolant in a 04 yukon 2500 with 8.1L. Just wondering how much Dex Cool I need to buy? I want to try and get as much of the old stuff out as possible. Are there block plugs on this motor? If not, I will fill with distilled water and run that through with no thermostat and empty again. I'm not sure how to get a 50/50 mix if there are no block plugs to empty the block.

 

Thanks for any info,

Jason

[txab]

According to my info your system is about 21 qts. So you would need to buy 3 gallons of Dexcool. Then 10-10.5 qts of Dex into your system for a 50/50 mix.

[jls8177]

Great. Thanks for the info.