GMC 1995 Suburban Owner's Manual page 141

Tachometer
Your tachometer
displays the engine
speed in revolutions
per minute (rpm).
I
NOTICE:
Do not operate the engine with the tachometer in the rea area,
your engine or other parts could be damaged.
Damage to your engine or vehicle caused by operating the
engine in the red area isn't covered by your vehicle warranty.
Warning Lights and lndicators
This part describes the warning lights and gages that may be on your
vehicle. The pictures will help you locate them.
Wdrning lights and gages can signa1 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. I f 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.
When one o f the warning lights comes on and stays on when you are
driving, or when one of the gages shows there may be a problem, check the
section that tells you what to do about it. Please follow
this
manual's advice.
Waiting to do repairs can be costly
-
and even dangerous. So please get to
know your warning lights and gages. They're
a
big help.