OK I will explain this as best as I can. I have no air coming through the dashboard vents. I hear the blower running, even as I cycle through the speeds. It sounds louder in recirc. There is air going through the center console to the back seat area. Also no defrost. However when I switch it to floor it works. Need some serious help here. Thanks.

Any help on this ??

sounds like you should replace the in cab filter.underneath glovebox theres 2 in there don't know replacement cost but there has been talk on other threads here hope this helps....joe

I just replaced mine yesterday. Very easy. Cost $16 from NAPA.

Look here for easy instructions and good pictures.

http://www.gm-trucks.com/IAR_cabfilter.shtml


Ben

Blnagle is right, they are very easy to replace and should fix your problem, my pickup does the same darn thing every harvest season, usually have to replace both filters twice a summer, haha, kinda a pain but at least i don't have straight dirt and chaff blowing in my face. ):h Good luck!

J-HEFF

Finally took truck into the dealer. They couldn't find problem. I even replaced the cabin filter. I was installing a CB radio and running the wires for it. I saw that the plug that controls the direction of flow ( ie, defrog, dash, floor) was disconnected. I plugged it back in and everything back to normal. Thanks for all the help.