GMC 1995 Safari Owner's Manual page 103

You may wonder what happens if your vehicle needs a new odometer
installed. If the new one can be set to the mileage total of the old odometer,
then it must be. But if it can't, then it's set at zero, and a label must be put
on the driver's door to show the old mileage reading when the new
odometer was installed.
Trip Odometer
Standard Cluster Digital Cluster
. ...
The trip odometer can tell you how far your vehicle has been driven since
you last set the trip odometer to zero.
To reset the trip odometer on the standard cluster, press the button near the
readout.
The trip odometer
on
the digital will appear in place of your regular
odometer when you press the TRIP button.
To reset the trip odometer on the digital cluster, press the RESET button. To
change back to the regular odometer, press the TRIP button again.
Warning Lights and Indicators
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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