Well, I'm probably just talking into the void right now - but ...
The problem was the "coolant bypass hose" they said the clamp was loose and they don't know how in the world she made it from Montana to Michigan, and then from Michigan to Denver pulling a 10K# gooseneck without it leaking before yesterday!
$340 to repair a loose hose clamp
Would removing or loosening this hose be something a shop would do when draining/flushing/refilling the coolant ???