Charging System Light; Voltmeter Gage - GMC 2010 Savana 1500 Cargo Owner's Manual

Charging System Light

If it does not, have the vehicle serviced by your
dealer/retailer.
The light should go out once the engine starts. If it stays
on, or comes on while driving, there could be a
problem with the charging system. A charging system
message in the Driver Information Center (DIC) can also
appear. See DIC Warnings and Messages on page 4-44
for more information. This light could indicate that
there are problems with a generator drive belt, or that
there is an electrical problem. Have it checked right
away. If the vehicle must be driven a short distance with
the light on, turn off accessories, such as the radio
and air conditioner.
This light comes on briefly
when the ignition key is
turned to START, but
the engine is not running,
as a check to show it
is working.

Voltmeter Gage

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 the low warning zone may occur when a
large number of electrical accessories are operating in
the vehicle and the engine is left at an idle for an
extended period. This condition is normal since the
charging system is not able to provide full power
at engine idle. As engine speeds are increased, this
condition should correct itself as higher engine speeds
allow the charging system to create maximum power.
When the engine is not
running, but the ignition is
on, this gage shows
the battery's state of
charge in DC volts.
4-27