2005 Buick Rendezvous Owner's Manual - Page 178

Retro-Active Reset The trip odometer has a feature called retro-active reset. This feature can be used to set the trip odometer to the number of miles or kilometers driven since the ignition was last turned on. This can be used if you forget to reset your trip odometer at the beginning of a trip. To use the retro-active reset feature, push and hold the trip/reset button for at least three seconds. The trip odometer will then display the number of miles or kilometers driven since the ignition was last turned on and you began driving. If you use the retro-active reset feature after you have started the vehicle, but before you begin moving, the display will show the number of miles or kilometers you drove during the last ignition cycle. Once you begin driving, the trip odometer will accumulate mileage. For example, if you have driven 5.0 miles (8.0 km) since you started your vehicle, and then activate the retro-active reset feature, the display will show 5.0 miles (8.0 km). As you drive, the display will then increase to 5.1 miles (8.2 km), 5.2 miles (8.4 km), etc. Tachometer The tachometer displays the engine speed in revolutions per minute (rpm). 3-40