2005 Pontiac Grand Prix Owner's Manual - Page 166
2005 Pontiac Grand Prix Manual
Page 166 highlights
The trip odometer has a feature called the retro-active reset. This can be used to set the trip odometer to the number of miles (kilometers) driven since the ignition was last turned on. This can be used if the trip odometer is not reset at the beginning of the trip. To use the retro-active reset feature, press and hold the set/reset button for at least three seconds. The trip odometer will display the number of miles or kilometers driven since the ignition was last turned on and the vehicle was moving. Once the vehicle begins moving, the trip odometer will accumulate mileage. For example, if the vehicle was driven 5.0 miles (8.0 km) before it is started again, and then the retro-active reset feature is activated, the display will show 5.0 miles (8.0 km). As the vehicle begins moving, the display will then increase to 5.1 miles (8.2 km), 5.2 miles (8.4 km), etc. If the retro-active reset feature is activated after the vehicle is started, but before it begins moving, the display will show the number of miles or kilometers that were driven during the last ignition cycle. Average Speed: The average speed is displayed in miles per hour (mph) or kilometers per hour (km/h). The average speed is calculated from the various vehicle speeds recorded since the last reset of this menu item. To reset the average speed, press the set/reset button. The display will return to zero. Press the trip odometer button again to advance to the next screen. 3-60 Time Elapsed: This screen can be used as a stopwatch. The display can show the hours, minutes and seconds. The elapsed time indicator will record up to 99 hours, 59 minutes and 59 seconds, then it will reset to zero and continue counting. To set the time elapsed function, use the following procedures: 1. Press the set/reset button for less than two seconds to start or stop the timer. 2. Press and hold the set/reset button for more than two seconds to reset the timer back to zero. Set/Reset r (Set/Reset): Press this button to set or reset a mode item when using the trip odometer or option buttons. Options 4 (Options): Press this button to access the Date, Language, Display Units, Daytime Display Enhancements, Engine Oil Monitor System, Tire Inflation Monitor System, Compass Calibration, and the Personal Programming modes. Date: This menu sets the date.