Join Date: Aug 2008
Location: North Central Wa
The spout is a drain from your heater/ac box that allows condensation to drain outside of the cab. If it is coolant, then x2 on the heater core going bad on you. They are not that hard to change out, but just in case, do check the heater hoses to be sure they are tight. They could leak enough to run inside, the out the drain.