Voltmeter Gauge
When the engine is not running, but the ignition is turned on, this gauge shows the battery's state of charge in DC volts.
When the engine is running, this gauge 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 comes on.
See Battery Voltage and Charging Messages on page 5‑37 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.
See also:
Engine Compartment Overview
2.4L L4 Engine
A. Engine Air Cleaner/Filter on page 10‑14.
B. Engine Cover on page 10‑9.
C. Engine Oil Dipstick (Out of View). See Engine Oil on page 10‑10.
D. Engine Oil Fill ...
Auxiliary Battery
The auxiliary battery provision can be used to supply electrical power to additional equipment that may be added, such as a slide-in camper.
If the vehicle has this provision, this relay will be loca ...
Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...