Did you ever get it fixed? I have the exact same problem and had the actuator door on the drivers replace twice, but that has not fixed it. The blower fan motor is blowing, but the air slowly stops coming out of the vents. I have noticed that while I am travelling at highway speeds and this happens, and I turn off the AC, and have the outside air button pushed, you DO NOT have air flowing thru the vents from the outside like you normally would. If I drive like this, with the AC and fan off, for 5 minutes or so, the outside air will slowly start coming in again thru the vents. If I then turn the AC back on, it will work for awhile before repeating the same problem. I am thinking it somehow has to do with whatever switch/actuator controls the vent that controls the outside air coming in. I have had this problem for over a year. The local chevy dealer had it for a week and said they could not find a code, and could not repeat the problem, but all they did was left it idling, they did not drive it, so it has to be moving to have this problem. Of course on the way home from the dealer it had the same problem. A local mechanic replace the actuator door twice but that did not fix the problem either.
Thursday, October 26th, 2017 AT 5:27 AM