brake fluid capacity?

[Metal_EMT]

anyone know roughly how much brake fluid our trucks hold? Lovely owners manual left that one out. I just did rear brakes and had to replace the wheel cylinders in the drums so while bleeding it, i wanna try and replace the fluid if i can. Don't want to run short on fluid to use but don't want to go overkill on the bottles to save a trip to advance.

2004 extended cab z71 4x4 3.5L

[97low]

just get 1 big and 1 small bottle and you should be good