Air vent position switch galant 2001 doesn't go to dash board position

There is a flapper or trap door in the dash board that diverts air flow to various vents, defrost, floor, face, etc. If that stops working it will get stuck in the default position which is usually the defrost vents.

If you have a vacuum operated system you can check the vacuum hose for the system in the engine compartment for integrity. If that is ok then you have to get to the vacuum switch in the dashboard and probably replace it due to leaking vacuum - labor intensive and not cheap.

Any time the dashboard has to be removed you are in trouble money wise.

Possible bad blend door actuator .some gm cars can be relearned to the new climate control head

The Hazard light switch is located in the middle of the center dash vent. The vent in the middle of the dash has two adjustable vents and the button that turns on the hazard lights is in between the two vents.

check the regulator /resistor its the component thats plugged in and mounted at the fan / blower unit this link should help
Replace Blower Motor Resistor in 2004 Silverado

Check the Instrument Cluster Fuse... I am willing to bet that is the problem

Might be the heater control. Where you change the position of the air.

{: ) Review again your climate settings, make sure sure it's not set to defrost or defog if you need that a/c on the dash face vents. If you felt that the a/c is cooling fine, then the problem is in the air distribution. It is possible that the HVAC actuators are not responding to the HVAC settings as requested. When the system detects a problem in one of the actuators, it will still try to execute the request but if not successful, it will assume a default position, which is the floor vent position.
There could be a binding door, a faulty actuator, or the wirings. Very seldom for the HVAC controller to be the cause, though also possible.
Normally when you turn ignition on, the actuator system self calibrates itself, say around forty seconds. That's why sometimes you may hear sounds within the dashboard. That's part of its normal functions. Try top turn ignition on or start the engine, but don't activate yet your a/c till after a minute. If that doesn't help, a scan tool may be needed to recalibrate the actuators.
If not successful in the recalibration, then proceed to deeper diagnostics and inspections. I hope you get lucky, and be spared of a possible dashboard removal.

It is the vent control. It is located on the passenger side behind the dash. It is vacuum controlled. It can fail and not let you change the vent positions.

Good Luck!

The Hazard light switch is located in the middle of the center dash vent. The vent in the middle of the dash has two adjustable vents and the button that turns on the hazard lights is in between the two vents.

have the water pump checked out, i had a van that did the same thing and founf i had a bad water pump it fixed the problem.also check the blower motor to make sure its working right by tapping on it while you have the car running. the car will survive dont worry its going to be one of those two things im pretty sure.