2002 Chevrolet Tahoe Owner's Manual - Page 194
2002 Chevrolet Tahoe Manual
Page 194 highlights
Heating The heater works best if you keep your windows closed while using it. On cold days, use the floor or bi-level setting with the temperature knob in the red area. On cold days, approximately 32_F (-0_C) or lower, if your vehicle is equipped with an automatic transmission, you may experience differences in how the transmission shifts until the engine is warm. This feature automatically reduces the time it takes for the engine to reach normal operating temperature and shortens the time it takes the heater to reach full output. If you use the engine coolant heater before starting your engine in cold weather, 20_F (-8_C) or lower, the heating system will produce warmer air faster to heat the passenger compartment. The use of an engine coolant heater also reduces the time it takes for the engine to reach normal operating temperature. For more information, see "Engine Coolant Heater" in the Index. Defogging and Defrosting On cool, humid days, use defrost setting to keep the windshield and side windows clear. Use the defrost setting to remove fog or ice from the windshield in extremely humid or cold conditions. Use the defrost setting with the temperature knob toward the red area and the fan control turned all the way to the right. Rear Window Defogger (If Equipped) If you see lines running across the rear window, you have a rear window defogger. The lines warm the glass. To turn on the rear window defogger, press this button next to the fan knob. The rear window defogger will only work if the ignition is in RUN. For best results, clear the window of as much snow or ice as possible. 3-14
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