Voltmeter Gauge - GMC 2013 Sierra Denali Owner's Manual

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5-16
Instruments and Controls
English
This gauge shows the engine
coolant temperature.
It also provides an indicator of how
hard the vehicle is working. During a
majority of the operation, the gauge
reads 100°C (210°F) or less.
If pulling a load or going up hills, it
is normal for the temperature to
fluctuate and go over the 113°C
(235°F) mark. If the gauge reaches
the 125°C (260°F) mark, it indicates
that the cooling system is working
beyond its capacity.
See
.

Voltmeter Gauge

When the engine is not running, but
the ignition is on, this gauge shows
the battery's state of charge in
DC volts.
When the engine is running, the
gauge shows the condition of the
charging system. The gauge can
transition from a higher to lower or a
lower to higher reading. This is
normal. Readings between the low
and high warning zones indicate the
normal operating range.
The voltmeter gauge may also read
lower when in fuel economy mode.
This is normal.
Readings in the low warning zone
can 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.
The vehicle can only be driven for a
short time with the reading in either
warning zone. If the vehicle must be
driven, turn off all unnecessary
accessories.

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