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: 119,422 (1,000–288,034)
13 model years affected: 1999, 2000, 2001, 2002, more2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
162 people reported this problem
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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
2004 Chevrolet Silverado 1500 103,000 mi,
Heat on all the time, can not turn off
2003 Chevrolet Silverado 1500 175,500 mi,
Driver cold passenger side hot..plz help
2005 Chevrolet Silverado 1500 100,000 mi,
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.
2002 Chevrolet Silverado 1500 199,236 mi,
can not change air delivery from floor outlets
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.
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.
2000 Chevrolet Silverado 1500 206,000 mi,
ac and heat doesnt work,fan worksin three of four speeds.
2007 Chevrolet Silverado 1500 120,000 mi,
I have no heat although the fan is working fine. One mid vent also produces no air. One heater line to the firewall from the engine is hot while the other is cold.
2004 Chevrolet Silverado 1500 150,000 mi,
ac & heat only blow out defroster
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.
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.
2007 Chevrolet Silverado 1500 107,008 mi,
I've changed the drivers side dual blend door actuator but the heat will intermittently blow hot to cold air. On the drivers side and the passenger side is completely fine. I'm really good with your regular mechanical problems but this electrical stuff has me lost on what to look for. Making it difficult to fix my issue.
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
It's either on cold or hot. There's no middle ground
2003 Chevrolet Silverado 1500 134,562 mi,
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
2004 Chevrolet Silverado 1500 123,000 mi,
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
Blows hot and cold air