2006 Pontiac GTO Owner's Manual - Page 122

Speedometer The speedometer shows vehicle speed in both miles per hour (mph) and kilometers per hour (km/h). Tachometer The tachometer shows engine speed in revolutions per minute (rpm). Notice: If you operate the engine with the tachometer in the shaded warning area, your vehicle could be damaged, and the damages would not be covered by your warranty. Do not operate the engine with the tachometer in the shaded warning area. Safety Belt Reminder Light When the key is turned to ON, the safety belt light will come on and stay on for several seconds and a chime will be sounded for eight seconds, then it will flash continuously until the driver's belt is buckled. If the driver's belt is already buckled, the light will not come on. For automatic transmission vehicle's, under wide open throttle acceleration, when the accelerator pedal is pushed flat to the floor, it is possible that the tachometer needle may briefly enter the lower end of the tachometer's red zone just prior to automatically upshifting into a higher gear. 3-24