GM Service Manual Online
For 1990-2009 cars only

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.

The tachometer displays the engine speed in revolutions per minute (rpm).

Fuel will shut off at about 6500 rpm. It will turn back on again once the vehicle rpm drops below 6500.