GM Service Manual Online
For 1990-2009 cars only

The trip odometer can record the number of kilometers traveled for up to two trips.

You can cycle between the odometer and trip odometers A and B by pressing the reset button located in the lower right area of the speedometer. By pressing the reset button, you can tell how many kilometers have been recorded on either Trip A or Trip B since you last set the trip odometer back to zero.

To reset each trip odometer to zero, press and hold the reset button. The reset button resets only the trip odometer that is displayed. Each trip odometer must be reset individually.