How much coolant does our 1st gens take? Im gonna flush my system this weekend and dont want to have to run to the auto parts store mid -project

 

I am not sure how many gallons out systems hold but be sure you get Low Silicate for Diesel service.
There are diffrent types of coolant.

I use Shellzone Premium Low Silicate (EG) Antifreeze in my Cummins

But I have to use propylene glycol (PG) coolant in my computer.

Here is some information on Ethylene Glycol Coolants.
Jim
http://www.eetcorp.com/antifreeze/Coolants_matrix.pdf