2011 GMC Savana 3500 Passenger Owner's Manual - Page 122

5-6 Instruments and Controls Do not operate any switches such as window, sunroof, climate controls, seats, etc. during the calibration procedure. 2. Press T until PRESS V TO CALIBRATE COMPASS displays. 3. Press V to start the compass calibration. 4. The DIC will display CALIBRATING: DRIVE IN CIRCLES. Drive the vehicle in tight circles at less than 8 km/h (5 mph) to complete the calibration. The DIC will display CALIBRATION COMPLETE for a few seconds when the calibration is complete. The DIC display will then return to PRESS V TO CALIBRATE COMPASS. If the DIC display does not show a heading, for example, N for North, or the heading does not change after making turns, there may be a strong magnetic field interfering with the compass. Such interference may be caused by a magnetic CB or cell phone antenna mount, a magnetic emergency light, magnetic note pad holder, or any other magnetic item. Turn off the vehicle, move the magnetic item, then turn on the vehicle and calibrate the compass. To calibrate the compass, use the following procedure: Compass Calibration Procedure 1. Before calibrating the compass, make sure the compass zone is set to the variance zone in which the vehicle is located. See "Compass Variance (Zone) Procedure" earlier in this section. Clock AM/FM Radio with Optional CD Player If the vehicle has an AM/FM radio with an optional CD player, it has a H button for setting the time. With these types of radios, the clock can be set with either the radio turned on or off. Set the time by following these steps: 1. Press H until the hour begins flashing on display. Press this button a second time and the minutes begin flashing on display. Press H a third time and the 12HR or 24HR time format begins flashing.