1994 Buick Park Avenue Owner's Manual - Page 131

service, and you should take your Buick to the dealer at once. To save your battery until you get there, turn off all accessories and set your air system to OFF. Tachometer Voltage Indicator If you have the optional gage cluster, this gage shows voltage in the electrical system. The normal range is 11 to 15 volts. If the reading stays outside the normal range, have your Buick dealer check the electrical system. The tachometer tells you how fast the engine is running. It displays engine speed in thousands of revolutions per minute (RPM). I NOTICE: Do not operate the engine with the tachometer in the red area,or engine damage may occur. 129