Charging System Light; Voltmeter Gage (Us-Canada) - Chevrolet 2009 Silverado 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 3-66
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 (US-Canada)

When the ignition is on, this gage indicates the battery
voltage.
When the engine is running, this gage shows the
condition of the charging system. The gage can
transition from a higher to lower or a lower to higher
reading. This is normal. If the vehicle is operating
outside the normal operating range, the charging system
light comes on. See Charging System Light on
page 3-41 for more information. The voltmeter gage
may also read lower when in fuel economy mode.
This is normal.
For vehicles with a
voltmeter gage, this gage
indicates the battery
voltage when the ignition
is turned on.
3-41