Dome Lamps; Dome Lamp Override; Entry/Exit Lighting; Reading Lamps - Hummer H2 2010 Owner's Manual

Dome Lamps

The dome lamps come on when any door is opened
and turns off when all doors are closed.
The dome lamps can also be turned on by turning the
instrument panel brightness knob, located next to the
exterior lamps control, clockwise to the farthest position.
In this position, the dome lamps remain on whether a
door is opened or closed.

Dome Lamp Override

The dome lamp override button is located next to the
exterior lamps control.
k
(Dome Off): Press the button in and the dome
lamps remain off when a door is opened. Press the
button again to return it to the extended position so that
the dome lamps come on when a door is opened.

Entry/Exit Lighting

The vehicle has an illuminated entry/exit feature.
The dome lamps come on if the dome override button is
in the out position, when a door is opened or the key is
removed from the ignition.
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Reading Lamps

There are reading lamps located in the overhead
console and on the DVD Rear Seat Entertainment
(RSE) system console, if equipped. Press the button
located next to each lamp to turn it on or off.
These lamps will also come on with the dome lamps.

Electric Power Management

The vehicle has Electric Power Management (EPM) that
estimates the battery's temperature and state of charge.
It then adjusts the voltage for best performance and
extended life of the battery.
When the battery's state of charge is low, the voltage is
raised slightly to quickly bring the charge back up.
When the state of charge is high, the voltage is lowered
slightly to prevent overcharging. If the vehicle has a
voltmeter gauge or a voltage display on the Driver
Information Center (DIC), you may see the voltage
move up or down. This is normal. If there is a problem,
an alert will be displayed.
The battery can be discharged at idle if the electrical
loads are very high. This is true for all vehicles. This is
because the generator (alternator) may not be spinning
fast enough at idle to produce all the power that is
needed for very high electrical loads.