Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Chevrolet Silverado 1500

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.

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Average mileage: 118,954 (3,000–257,000)
13 model years affected: 1999, 2000, 2001, 2002, more2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011, 2013
139 people reported this problem
92 people shared problem details
ac blows hot air on drivers side, have to pull over and restart the engine this sucks big time
Left drivers side vents blowing hot air when ac on..... passenger side blowing cool air
Heat on all the time, can not turn off
Drivers side AC will intermittently switch to heater. Only remedy once heat starts is to restart engine. Seems to happen after relative high speed and slow down, will kick off when acceleration resumes. Also seems to happen between 75-85 deg outside temp the most often. It has become major annoyance but expensive fix.
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.
can not change air delivery from floor outlets
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.
ac and heat doesnt work,fan worksin three of four speeds.
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.
heat on the left side failed. replaced actuator, but unfortunately heater core failed at the same time so i had dto replace that too
ac & heat only blow out defroster
When you drive down the road the AC on the drivers side starts blowing out hot air. You have to stop and restart the truck for it to blow cold air again. The passenger side continues to blow cold air and is not affected. It started doing in one time a day but is now doing it four or five times a day. It is currently in the shop. He has replaced two Actuators at $126 each, but he says the problem has not been fixed. I will update this post after I pick it up.
Blows hot and cold air
heat wont come out on the floor on drivers side works on dash but not the floor
driver side has heat and cold, passenger side ac and no heat
Ax blows hot air on drivers side
Hot air on driver's side; cold on passenger's. Still broken.
Intermittent problem with driver side ac blows hot passenger side ice cold not all the time shut truck off 20-30 min. Later both sides blow cold.With ac and blower off still fill and fan off can still fill air blow slightly out of vents
Cold air blowing out drivers side heat
Driver cold passenger side hot..plz help
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