Voltmeter Gage Operation - GMC Defense 2006 Owner's Manual Supplement

charging system may not be able to provide full
power at engine idle. As engine speeds are
increased, this condition should correct itself
because higher engine speeds allow the charging
system to create maximum power. The 24-voltmeter
gage is located in the lower right side of the
accessory panel. The voltmeter is located in the
instrument panel next to the service and blackout
lighting switch.

Voltmeter Gage Operation

Engine Running
The gage needle should be in the green band when
engine speed is above an idle. If the needle is not in
the green band, the fuse element may have melted. If
the fuse is not blown and the system still does not
3-10
operate properly, consult your local GM Goodwrench®
dealer.
Engine Off
In a no load situation, with the engine off, the gage
needle should be mid-way between the red band and
green band, in the yellow band. If the gage needle is
in the lower end of the yellow band, this is
unacceptable, and the 24-volt battery may have run
down.