Andy03SS Posted September 22, 2003 Report Share Posted September 22, 2003 An odd problem has appeared, the vent for heat/ac is getting stuck open for heat on the passenger side. If I put on some heat in the morning, and then later lower the temp to cold for some fresh air I'm still getting heat out of the passenger vents. Luckily the driver's vents are working ok. Once the engine is shut off the vent flap appears to be corrected and cool air will blow out the passenger vent. I don't have climate control, just two temp sliders for driver and passenger. Anyone else run across this problem ? I hate to have the service guys tear into the dash to fix it... Andy03SS Link to comment Share on other sites More sharing options...
jdub Posted September 22, 2003 Report Share Posted September 22, 2003 That happened to my 2000 Silverado right before I traded it in, but I never found out what the problem was. Link to comment Share on other sites More sharing options...
SuperDave Posted September 22, 2003 Report Share Posted September 22, 2003 I have a 1991 Silverado that did something similar. It was a heater box plenum actuator. Didn't cost but 47.00 for the part, but took the shop almost an hour to install it, making it a 120.00 repair! It's bolted to the air ducting plenum right next to the firewall up under the dash. Very tough to reach. When it went out, the vaccum would try to close the valve, but the electric part of it would try to open it. Resulting in a constant tapping noise of the valve shutting Talk about Chinese water torture! Link to comment Share on other sites More sharing options...
2xtreme Posted September 22, 2003 Report Share Posted September 22, 2003 I'd be on the phone w/ the dealership making an appointment Link to comment Share on other sites More sharing options...
Andy03SS Posted September 23, 2003 Author Report Share Posted September 23, 2003 Thanks for the replies, calling the dealer for an appt. Link to comment Share on other sites More sharing options...
Banone Posted September 24, 2003 Report Share Posted September 24, 2003 Mine did the same thing last week. I remember a post a few months back of someone's doing this with the slider bar controls. Please post what you find out. Hopefully it's an easy fix. Link to comment Share on other sites More sharing options...
jwest1975 Posted September 25, 2003 Report Share Posted September 25, 2003 Any luck at the dealer Andy03SS? Justin Link to comment Share on other sites More sharing options...
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