2010 GMC Acadia Owner's Manual - Page 130

5-6 Instruments and Controls Under certain circumstances, such as during a long distance cross-country trip or moving to a new state or province, it will be necessary to compensate for compass variance by resetting the zone through the DIC if the zone is not set correctly. Compass variance is the difference between the earth's magnetic north and true geographic north. If the compass is not set to the zone where you live, the compass may give false readings. The compass must be set to the variance zone in which the vehicle is traveling. To adjust for compass variance, use the following procedure: Compass Variance (Zone) Procedure 1. Do not set the compass zone when the vehicle is moving. Only set it when the vehicle is in P (Park). 2. Find the vehicle's current location and variance zone number on the map. Zones 1 through 15 are available. 3. Press the set/reset button to scroll through and select the appropriate variance zone. Press the vehicle information button until PRESS V TO CHANGE COMPASS ZONE displays. Release the button when enough fluid has been sprayed on the window. The rear wiper will run a few more cycles after it is released. If the rear wiper function was already on, prior to pressing the wash button, it stays on until the wiper button is pressed again. The rear window washer uses the same fluid that is in the windshield washer reservoir. See Washer Fluid on page 10‑21. Compass Your vehicle may have a compass in the Driver Information Center (DIC). See Driver Information Center (DIC) (With DIC Buttons) on page 5‑24 or Driver Information Center (DIC) (Without DIC Buttons) on page 5‑29 for more information about the DIC. Compass Zone The zone is set to zone eight upon leaving the factory. Your dealer/retailer will set the correct zone for your location.