Coolant volume question
I'm due for a coolant change so have been looking at other's experiences and advice. My little 5.9 liter Cummins certainly won't be as involved as the wet sleeve biggies but I find the coolant volume listed in the Cummins booklet (2.9 gallons) unbelievable unless it indicates the block contents only, which, if so, is not too helpful. When I buy supplies, I'd like to get enough but not have an excess. So, the questions:
Does anyone know the approximate amount of coolant for my 2006 Journey with the 5.9 Cummins, including radiator, heater, and hot water aide, that is, the whole system?
Absent an answer to the above, who is the best to contact for the info - Winnebago, Freightliner, or Cummins?
2006 32T Journey
2010 Chevy Malibu toad