One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
Car Problem Reports
Chevrolet Silverado 1500 Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail
Chevrolet Silverado 1500 Problem
Average Mileage: 116,496 mi (46,000 mi - 206,000 mi)
Visitor, 2004 Chevrolet Silverado 1500, 80,000 mi
ac blows hot air on drivers side, have to pull over and restart the engine this sucks big time
Visitor, 2004 Chevrolet Silverado 1500, 103,000 mi
Heat on all the time, can not turn off
Visitor, 1999 Chevrolet Silverado 1500, 116,000 mi
a/c and heat all comes out of defrost vent and cannot switch from hot to cold without shouting off engine for a little bit.
Visitor, 2000 Chevrolet Silverado 1500, 206,000 mi
ac and heat doesnt work,fan worksin three of four speeds.
Visitor, 2004 Chevrolet Silverado 1500, 129,000 mi
heat on the left side failed. replaced actuator, but unfortunately heater core failed at the same time so i had dto replace that too
Visitor, 2004 Chevrolet Silverado 1500, 121,000 mi
Ditto. Occasionally the driver side air will go from AC to heat! Have to stop the car and restart it to get it to be AC again. Time to sell and buy a Ford.
Visitor, 2003 Chevrolet Silverado 1500, 85,000 mi
The passenger side air blows only hot air, because the acctuator door is broken. I took the vents out and sealed them so that no air comes out of the passenger side vents. This is obviously not the best solution, but the acctuator is so hard to get to that it isn't worth it to me.
Visitor, 2002 Chevrolet Silverado 1500, 199,236 mi
can not change air delivery from floor outlets
Visitor, 2004 Chevrolet Silverado 1500, 151,000 mi
Blows very hot air on the driver's side only. Will go from A/C to heat immediately. Sometimes corrects itself when the engine has been turned off and restarted.
Visitor, 1999 Chevrolet Silverado 1500, 189,000 mi
mode blend door actuator went out. When I install a new one, it works one time and quits working. I installed correctly (I didnt plug the power to it until it was installed).