Chevrolet 2002 Impala Owner's Manual page 149

Tachometer (If Equipped)
3800 V6 Engine shown
NOTICE:
Do not operate the engine with the tachometer in
the shaded area, or engine damage may occur.
The tachometer displays
the engine speed in
thousands of revolutions
per minute (rpm).
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.
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