Welcome to the forum. The hose that is looped back to the engine block from water pump, should go to the heater core. The hose that is hanging loose, one end goes to the heater core, other end goes to engine block.
I haven't looked at or found a heater hose routing diagram for your year. I will look. On older GM vehicles, I have bypassed heater cores, that same way.
Friday, January 15th, 2010 AT 3:49 PM