Battery Voltage and Charging Messages
BATTERY SAVER ACTIVE
This message displays when the system detects that the battery voltage is dropping below expected levels. The battery saver system starts reducing certain features of the vehicle that you may be able to notice. At the point that the features are disabled, this message is displayed. It means that the vehicle is trying to save the charge in the battery.
Turn off all unnecessary accessories to allow the battery to recharge.
The normal battery voltage range is 11.5 to 15.5 volts.
SERVICE BATTERY CHARGING SYSTEM
On some vehicles, this message displays if there is a problem with the battery charging system.
Under certain conditions, the charging system light may also turn on in the instrument panel cluster.
See Charging System Light on page 5‑18. Driving with this problem could drain the battery. Turn off all unnecessary accessories. Have the electrical system checked as soon as possible. See your dealer.
See also:
How to Check Lubricant
2500HD with 6.0 L
All Other Series and Engines
To get an accurate reading, the vehicle should be on a level surface.
• For all 4.3 L, 4.8 L and 5.3 L 1500 Series applications, the proper leve ...
Online Owner Center
Manage your vehicle (U.S.) at gmc.com. Click on “Owners,” then “Manage My GMC/Owners Login.”
Information and services customized for your specific vehicle — all in one convenient place.
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Driving in Mud, Sand, Snow, or Ice
Use a low gear when driving in mud – the deeper the mud, the lower the gear.
Keep the vehicle moving to avoid getting stuck.
Traction changes when driving on sand. On loose sand, such as on beach ...