I have an RV Class C that sits on the chassis of a 2005 Chevrolet Express 3500 with a 6.0-liter engine. Can not find the drain plug, and the radiator sits right above a frame support in the front. It has a quick connect lower radiator hose but if I remove that connection water and coolant goes all over the place.
Does anyone know where or if the drain plug is accessible on this beast?

 

If it's anything like the normal vans, it's on the driver's side, on the back right at the bottom.

 

I looked everywhere and came to the conclusion that you have to remove the click that holds the lower hose to the radiator and let the water out there...a mess. Engineer should be fired. i can see how there is little room or a drain valve but it could have been one attached to a hose that came from the radiator.
Anyhow it is what it is.

 

A surprising number of vehicles are like that. No drain plug, just have to remove the lower hose.

 

I have a drain plug on my 93 Suburban but removing the hose is much easier & quicker, and yes, more of a mess