Chevrolet SUBURBAN 1994 Manual page 132

A reading in the low pressure zone may be caused by a dangerously low oil
level
or
other problem causing low oil pressure. Check your oil as soon as
possible.
I
NOTICE:
Damage to your engine from neglected oil problems can be
costly and is not covered by your warranty.
Voltmeter
Standard Cluster Tachometer Cluster
14
When your engine is not running, but the ignition is on (in the RUN
Position), this gage shows your battery's state of charge in DC volts. When
the engine is running, the gage shows the condition of the charging system.
Readings between the low and high warning zones indicate the normal
operating range.
Readings in either warning zone indicate a possible problem in the electrical
system.
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