2008 Pontiac G8 Owner's Manual - Page 147

Climate Controls Do not use the recirculation mode if occupants are smoking. The recirculation mode cannot be turned on in defrost mode. If / is pressed, the indicator light flashes three times and recirculation stays off. Pollution Mode: Press and hold the / button for four seconds to turn the pollution mode on or off. When it is activated, Pollution Mode Activated appears in the display. When it is turned off, Pollution Mode Inactive appears in the display. This mode can be set when the vehicle speed is less than 9 mph (15 km/h). Recirculation will automatically turn on to help prevent exhaust fumes from entering the vehicle in slow moving traffic. 7-7 Rear Window Defogger The rear window defogger uses a warming grid to remove fog or frost from the rear window. It only works when the ignition is in ON/RUN. The rear window defogger will only work when the ignition is in ON/RUN. EXT TEMP EXT TEMP (Exterior Temperature): Press EXT TEMP to show the temperature outside the vehicle or the normal display. Pressing any other climate control button will change the display from showing the outside temperature to showing the normal display. The units for the EXT TEMP can be displayed in °F or °C. See DIC Vehicle Customization on page 4-32. + (Rear Window Defogger): Press to turn the rear window defogger on or off. The + indicator appears in the display. The rear window defogger turns off automatically if it is left on. Notice: Do not use anything sharp on the inside of the rear window. If you do, you could cut or damage the warming grid, and the repairs would not be covered by the vehicle warranty. Do not attach a temporary vehicle license, tape, a decal or anything similar to the defogger grid. Sensors The climate control system uses three different sensors to maintain the desired temperature. The solar sensor is located on the instrument panel, near the windshield. The interior temperature sensor is located on the instrument panel near the steering wheel and the outside temperature sensor is in front of the radiator.