2004 Pontiac Grand Prix Owner's Manual - Page 162

ENGINE OIL MONITOR SYSTEM: This menu lets you reset the engine oil monitor system for the vehicle. See "When to Change Engine Oil (GM Oil LIfe System)" under Engine Oil on page 5-16. To reset the engine oil monitor system use the following procedure: 1. Press the set/reset button to reset the engine oil monitor system. The confirmation, ENGINE OIL MONITOR HAS BEEN RESET, will appear on the next screen. 2. Press the options button again to advance to the next screen. Tire Inflation Monitor System: If the vehicle has ABS, this menu lets you set the tire inflation monitor system. See "Tire Inflation Monitor System" under Inflation - Tire Pressure on page 5-69 for more information. To set or reset the tire inflation monitor system use the following procedures: 1. Press the set/reset button to reset the tire inflation monitor system. TIRE INFLATION HAS BEEN SET will appear on the next screen to confirm this system has been set. 2. Press the options button again to advance to the next screen. Select the set/reset button to return to the main (date) screen. COMPASS CALIBRATION MODE: Setting the Compass The compass is self-calibrating, which eliminates the need to manually set the compass. However, 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 earth's magnetic north and true geographic north. If not adjusted to account for compass variance, the compass in your vehicle could give you false readings. In order to do this, you will have to set or calibrate the compass to the variance zone in which you are located. 3-58