Whew...

Goodyear just called - it was the freeze plug. It did exactly what it was supposed to do...it blew out when the block froze up (because *somebody* didn't check the antifreeze!)

With an oil change, a radiator flush, and the tow, my total bill is $275. MUCH better than if the block had cracked.

My Durango will be okay, and should be home this afternoon. :-)