2005 Buick LaCrosse Owner's Manual - Page 166

Personalization Press the option button until PERSONAL PROGRAM displays. Your vehicle may have personalization capabilities that allow you to program certain features to a preferred setting for up to two drivers. Your vehicle may also have customization capabilities that allow you to program certain features to one preferred setting. Customization features can only be programmed to one setting on the vehicle and cannot be programmed to a preferred setting for up to two drivers. See DIC Vehicle Personalization on page 3-71 for additional information on personal programming. To adjust for compass variance, use the following procedure: Compass Variance Procedure 1. Press the option button until COMPASS ZONE displays. Compass Zone Under certain circumstances, such as during a long distance cross-country trip, it will be necessary to compensate for compass variance and reset the zone through the DIC. Compass variance is the difference between the earth's magnetic north and true geographic north. If not adjusted to account for compass variance, the compass in the vehicle could give false readings. In order to do this, the compass must be set or calibrated to the variance zone in which the vehicle is travelling. 2. Find the vehicle's current location and variance zone number on the map. Zones 1 through 15 are available. 3-52