2011 Chevrolet Tahoe Owner's Manual - Page 278

8-8 Climate Controls The recirculation mode can also be turned off by turning off the ignition. REAR: For vehicles with the rear heat and air conditioning controls. Press to turn the rear climate control system on or off. See Rear Climate Control System (Rear Climate Control Only) on page 8‑10 or Rear Climate Control System (Rear Climate with Rear Seat Audio) on page 8‑11. Notice: Do not use a razor blade or sharp object to clear the inside rear window. Do not adhere anything to the defogger grid lines in the rear glass. These actions may damage the rear defogger. Repairs would not be covered by your warranty. Heated Mirrors: Press 1 to help clear fog or frost from the surface of the outside mirror. See Power Mirrors on page 2‑17. @ (Recirculation): Press to turn the recirculation mode on or off. An indicator light comes on to show that the recirculation is on. This mode recirculates and helps to quickly cool the air inside the vehicle. It can be used to help prevent outside air and odors from entering the vehicle. The recirculation mode cannot be used with floor, defog, or defrost modes. If recirculation is selected with one of those modes, the indicator light flashes three times and then turns off. The air conditioning compressor also comes on when this mode is activated. While in recirculation mode the windows may fog when the weather is cold and damp. To clear the fog, select either the defog or defrost mode and increase the fan speed. Rear Window Defogger The rear window defogger uses a warming grid to remove fog from the rear window. 1 (Rear Window Defogger): Press to turn the rear window defogger on or off. It automatically turns off several minutes after it has been activated. The defogger can also be turned off by turning off the engine. Do not drive the vehicle until all the windows are clear.