2014 Chevrolet Express 3500 Cargo Owner Manual - Page 185

Climate Controls 8-3 It only works when the ignition is in ON/RUN. 1 (Rear Window Defogger): Press to turn the rear window defogger on or off. The rear window defogger turns off several minutes after the button is pressed. If turned on again, the defogger will run for several more minutes before turning off. The defogger can also be turned off by turning off the engine. Do not drive the vehicle until all the windows are clear. Vehicles with Air Conditioning 1. Fan Control 2. Temperature Control 3. Air Delivery Mode Control 4. Rear Window Defogger On hot days, open the windows to let hot inside air escape; then close them. This helps to reduce the time needed for the vehicle to cool down and the system operates more efficiently. # (Air Conditioning): Cools and dehumidifies the air inside of the vehicle. { Caution 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 the vehicle warranty. V (Maximum Air Conditioning): Cools the air inside the vehicle faster, by recirculating the inside air. Rear Window Defogger If equipped with a rear window defogger, a warming grid is used to remove fog or frost from the rear window.