charging HUMMER H3 2007 Owners Manual

Automatic Transmission Operation
The automatic transmission has a shift lever on
the console.
It features an electronic shift position indicator
within the instrument cluster. This display must be
powered anytime the shift lever is capable of
being moved out of PARK (P). This means that if
your key is turned off, but not in LOCK, there
will be a small current drain on your battery which
could discharge your battery over a period of
time. If you need to leave your key in the ignition
but not in LOCK for an extended period, it is
recommended that you disconnect the battery
cable from the battery to prevent discharging your
battery.
There are several different positions for your shift
lever.PARK (P):This position locks your rear wheels.
It is the best position to use when you start the
engine because your vehicle cannot move easily.
{CAUTION:
It is dangerous to get out of your vehicle
if the shift lever is not fully in PARK (P)
with the parking brake rmly set. Your
vehicle can roll.
Do not leave your vehicle when the engine
is running unless you have to. If you have
left the engine running, the vehicle can
move suddenly. You or others could be
injured. To be sure your vehicle will not
move, even when you are on fairly level
ground, always set your parking brake and
move the shift lever to PARK (P).
SeeShifting Into Park (P) (Automatic
Transmission) on page 117. If you are
pulling a trailer, seeTowing a Trailer on
page 297.
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Dome Lamp Override
E(Dome Lamp Override):You can use the
dome override button, located below the exterior
lamps control, to set the dome and footwell
lamps to come on automatically when a door is
opened, or to remain off. To turn the lamps
off, press the button into the in position. With the
button in this position, the dome lamps will
remain off when the doors are open. To return
the lamps to automatic operation, press the
button again and return it to the out position.
With the button in this position, the dome lamps
will come on when you open a door.
Exit Lighting
With exit lighting, the interior lamps will come
on when you remove the key from the ignition.
The lamps will not come on if the dome override
button is pressed in.
Reading Lamps
Your vehicle has reading lamps. Press the button
located next to the lamp to turn them on or off.
These lamps will not 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 put the charge
back in. When the state of charge is high, the
voltage is lowered slightly to prevent overcharging.
If the vehicle has a voltmeter gage, 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.
A high electrical load occurs when several of the
following loads are on: headlamps, high beams,
fog lamps, rear window defogger, climate
control fan at high speed, heated seats, engine
cooling fans, trailer loads, and loads plugged into
accessory power outlets.
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Battery Warning Light
This light will come on
briey when you start
the vehicle, as a
check to show you
it is working; then
it should go out.
If it stays on, or comes on while you are driving,
you may have a problem with the electrical
charging system. Have it checked right away.
Driving while this light is on could drain your
battery and result in a vehicle that may stall.
SeeDIC Warnings and Messages on page 196
for more information.
If you must drive a short distance with the light
on, be certain to turn off all your accessories,
such as the radio and climate control system.
Up-Shift Light
(Manual Transmission)
This light appears when
you need to shift to the
next higher gear on
a manual transmission
vehicle.
Shifting when the indicator light is on will help you
get the best fuel economy. See “Up-Shift Light”
underManual Transmission Operation on
page 109for more information.
181

SERVICE CHARG (Charge)
SYS (System)
This message displays if there is a problem
with the battery charging system. Under certain
conditions, the battery warning light may also turn
on in the instrument panel cluster. SeeBattery
Warning Light on page 181. The battery will not be
charging at an optimal rate and the vehicle will
lose the ability to enter the fuel economy mode.
The vehicle is safe to drive, however have
the electrical system checked by your dealer.
Press and release the reset stem to acknowledge
the message and clear it from the display.
SERVICE STAB (Stability)
SYS (System)
This message displays if there is a problem
with the StabiliTrak®system. Have your vehicle
serviced by your dealer. SeeStabiliTrak®System
on page 244for more information.
STAB (Stability) SYS (System) OFF
This message displays when the StabiliTrak®
system is turned off. SeeStabiliTrak®System
on page 244for more information.
TRAC (Traction) OFF
This message along with the traction off light
displays when the Traction Control System (TCS)
is turned off by pressing the TCS button. See
Traction Off Light on page 184andTraction
Control System (TCS) on page 241for more
information.
TRACTION FAILED
This message displays if there is a problem with
the Traction Control System (TCS). Check
the TCS as soon as possible and have your
vehicle serviced by your dealer. SeeTraction
Control System (TCS) on page 241for more
information. Press and release the reset stem to
acknowledge the message and clear it from
the display.
TURN SIGNAL
This message displays when the turn signal is
on for about 0.75 miles (1.2 km) of travel. Press
and release the reset stem to acknowledge
the message and clear it from the display.
200

Heavy-Duty Trailer Wiring Package
If your vehicle is equipped with a trailer towing
package, the rear bumper harness will have
a seven-pin universal heavy-duty trailer connector
attached to a bracket on the hitch platform.The trailer towing harness contains the following
seven trailer circuits:
Yellow: Left Stop/Turn Signal
Dark Green: Right Stop/Turn Signal
Brown: Taillamps
White: Ground
Light Green: Back-up Lamps
Red: Battery Feed
Dark Blue: Trailer Brake
If you are charging a remote (non-vehicle) battery,
turn on the headlamps to boost the vehicle
system voltage to properly charge the battery.
308