Auto Air Conditioning & Heater Repair: vent change, vacuum hoses, vent locations

Question
on a 2000 pontiac grand prix se 3.1.I can't change to the different vent locations onm myn dash.It seems to be stuck on the floor.what could couse this and where is the part(s) located.Thank You for many help. Vince  

Answer
HI Vince

Check your vacuum hoses in the engine compartment.  If some work was done in the engine compartment maybe it became disconnected.  Look for some black hoses coming out of the engine block usually on the drivers side behind the engine.  There is also another hose underneath and  beside the battery area.  Just repair as needed and you will be OK. Good luck