Voltmeter gage, Voltmeter gage -46 – GMC 2008 Acadia User Manual

Page 188

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Voltmeter Gage

When the engine is not
running, but the ignition
is turned on, this gage
shows the battery’s state
of charge in DC volts.

When the engine is running, this gage shows the
condition of the charging system. The vehicle’s
charging system regulates voltage based on the state
of charge of the battery. The voltmeter may fluctuate.
This is normal. Readings between the low and high
warning zones indicate the normal operating range.

Readings in the low warning zone may occur when a
large number of electrical accessories are operating
in the vehicle and the engine is left idling for an
extended period.

If there is a problem with the battery charging system,
a SERVICE BATTERY CHARGING SYSTEM message
will appear in the Driver Information Center (DIC)
and/or the charging system light will come on. See
DIC Warnings and Messages on page 3-66 and
Charging System Light on page 3-45 for more
information.

However, readings in either warning zone may
indicate a possible problem in the electrical system.
Have the vehicle serviced as soon as possible.

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