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:
Adding Washer Fluid
Open the cap with the washer symbol on it and add washer fluid until full. See
Engine Compartment Overview on page 10‑6 for reservoir location.
Notice
○ When using concentrated washe ...
If You Cannot See the HUD Image When the Ignition Is On
• Is anything covering the HUD lens?
• Is the HUD dimmer setting bright enough?
• Is the HUD image adjusted to the proper height?
• Are you wearing polarized sunglasses?
• Still no HUD i ...
Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehic ...





