2003 GMC Sonoma Owner's Manual - Page 118

UWMET: When this button is pressed, the temperature will be displayed in either degrees Farenheit (English) or Celsius (metric). Before you turn on the ignition and move the vehicle, the temperature indicated will be the last outside temperature recorded with the ignition on. If the outside temperature is 37°F (3°C) or lower when you turn on the ignition, the word ICE will appear on the display. This is a warning to the driver that road conditions may be icy, and that appropriate precautions should be taken. The compass is self-calibrating, so it does not need to be manually set. However, when yourvehicle is new, the compass may function erratically. If it does, CAL (Calibration) will appear on the display. To correct the calibration, drive in a complete 360" circle three times and the compass will function normally. Variance is the different between magnetic north and geographic north. In some areas, the difference between the two can be great enough to cause false compass readings. If this happens, follow these instructions to set the variance for your particular location: 1. Find your location on the zone map. Record your zone number. 2. Press and hold both the ON/OFF and the US/MET buttons. The display will go off. 3. After five seconds, VAR CAL (Variance Calibration) will appear on the display. When it does, release both buttons. 4. Press US/MET until your zone number appears on the display. 5. Press ON/OFF to enter your zone number. Your variance is now set. 2-43