Oldsmobile 1999 Aurora - Manual (Page 122)

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Tachometer
The tachometer displays the
engine speed in revolutions
per minute (rpm).
If your engine speed equals or exceeds the safe limit for
operation, the message HOT...REDUCE ENGINE RPM
is displayed on the information center.
NOTICE:
Do not operate the engine with the tachometer
in the red area, or when the message
HOT...REDUCE ENGINE RPM is displayed.
Engine damage may occur.
Warning Lights, Gages
and Indicators
This part describes the warning lights and gages that may
be on your vehicle. The pictures will help you locate them.
Warning lights and gages can signal that something is
wrong before it becomes serious enough to cause an
expensive repair or replacement. Paying attention to
your warning lights and gages could also save you or
others from injury.
Warning lights come on when there may be or is a
problem with one of your vehicle’s functions. As you
will see in the details on the next few pages, some
warning lights come on briefly when you start the
engine just to let you know they’re working. If you are
familiar with this section, you should not be alarmed
when this happens.
Gages can indicate when there may be or is a problem
with one of your vehicle’s functions. Often gages and
warning lights work together to let you know when
there’s a problem with your vehicle.