2004 Chevy Truck Silverdo Floor Air Vents Diagram. 2004 chevrolet silverado ac is not blowing through dash vents only through defrost vents these trucks are equipped with an electric vent door motor known as a vent actuator. 2004 chevrolet silverado ac is not blowing through dash vents only through defrost vents chevrolet 2005 silverado question.

2001 chevrolet silverado wiring diagram. Why do my vents blow only hot or cold air. When heat is built up inside of the heater core the actuator door shifts to allow the hot air through the system and when the climate control is turned to cool the door flaps in the other direction closing off the heater core.

Controls which vents the air comes out of.

The heater blend doors act as a gateway to the vehicle s ventilation system. Read this article to find out why. Chevrolet 2004 silverado 1500 5 3l v8 heat air conditioning heater blend. Only the one vent next to the radio works on the dash.