2000 Chevy Blazer Climate control - no floor heat

Finally I had a chance to look under the driver and passanger seats. There are vacuum lines to open and close doors. The lever seems to move when I change switch to floor from panel or defrost implying the lines are not leaking. The lines have a small vacuum pressure. The lever to open floor door may be broken. And there is no easy way to tell. Dealer is asking 3.5 hrs of labor and other place wants 8 hrs of labor to repair. They will remove dash board and anything to get to the door. To me this repair cost of about $400 is not worth fixing the floor heat. So I will open it myself, when I have the time to do it.

There is one thing that worries me. Can anyome please tell me if I should be aware of anythig in particulr about airbags? It appears that I have to take out passengar air bag, but not driver side airbag. Are they easy to take off? Any advice would be appreciated.

My blazer has a similar problem. Lots of hot air through the defrost and dash, just no floor heat. I checked behind the glove box too. No problems there. I followed the vacuum lines around and the blue and red ones went to the heat/defrost door in question directly above the accelerator pedal. It appeared the lever was flopping around. I will try to make a repair without removing the whole dash. Read my post to see if the problem is the same. You can access this actuator by just removing the cover below the steering column. Quick and easy to get at the actuator.

I'll post when I figure something out this weekend.

I end up taking a 14-gauge electric wire about 2 feet long and sticking up through the driver side botton vent. I had to bend it to make it go through the vent and I was able to open the door. The heat came right through the vent. Woo hoo! I left the wire there for another day to remove and fix the problem correctly. It has been a few week and just waiting to get a chance to spare a few hours to do something about it.