2003 Pontiac Grand Prix Owner's Manual - Page 146

Your vehicle is equipped with this cluster or one very similar to it. It includes indicator warning lights and gages that are explained on the following pages. Be sure to read about them. Trip Odometer The trip odometer tells how far you have driven since you last reset it. To set it to zero, press the reset button located to the right of the instrument panel cluster. Speedometer and Odometer The speedometer lets you see your speed in both miles per hour (mph) and kilometers per hour (km/h). The odometer shows how far the vehicle has been driven in either miles (used in the United States) or in kilometers (used in Canada). The vehicle has a tamper-resistant odometer. If you see silver lines between the numbers,you'll know someone has probably tampered with it and the numbers may not be correct. You may wonder what happens if the vehicle needs a new odometer installed. If the new one can be set to the mileage total of the old odometer, then that will be done. If it can't, then it will be set at zero and a label must be put on the driver's door to show the old mileage reading when the new odometer was installed. Tachometer The tachometer displays the engine speed in thousands of revolutions per minute (rpm). Notice: Do not operate the engine with the tachometer in the shaded warning area, or engine damage may occur. 3-25