brake HUMMER H3 2007 User Guide

Parking Brake
The parking brake pedal
is located to the left of
the regular brake pedal,
near the driver’s door.
To set the parking brake, hold the regular brake
pedal down with your right foot. Push the
parking brake pedal down to its fully-applied
position with your left foot.
A chime will activate and the brake warning light,
located on the instrument panel, will ash
when the parking brake is applied and the vehicle
is moving at least 3 mph (5 km/h) for at least
three seconds. The chime will deactivate and the
light will turn off when the parking brake is set
and the vehicle is moving below 3 mph (5 km/h).
SeeBrake System Warning Light on page 182.To release the parking brake, hold the regular
brake pedal down. Pull the bottom edge of
the lever, located above the parking brake pedal,
with the parking brake symbol, directly rearward
to release the parking brake.
If the ignition is on when the parking brake is
released, the brake system warning light will go off.
Notice:Driving with the parking brake on can
overheat the brake system and cause premature
wear or damage to brake system parts. Verify
that the parking brake is fully released and the
brake warning light is off before driving.
If you are towing a trailer and are parking on any
hill, seeTowing a Trailer on page 297.
116

Shifting Into Park (P)
(Automatic Transmission)
{CAUTION:
It can be 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. 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,
use the steps that follow. If you are
pulling a trailer, seeTowing a Trailer on
page 297.
1. Hold the brake pedal down with your right foot
and set the parking brake.
{CAUTION:
With all-wheel drive, your vehicle will be
free to roll — even if your shift lever is in
PARK (P) — if your transfer case is in
NEUTRAL. So, be sure the transfer case is
in a drive gear, four-wheel high (4H) or
four-wheel low (4L) — not in NEUTRAL.
2. Move the shift lever into PARK (P) by pressing
the shift lever button and moving the lever as
far forward as it will go.
3. Turn the ignition key to LOCK.
4. Remove the key and take it with you. If you
can leave your vehicle with the key, your
vehicle is in PARK (P).
117

Leaving Your Vehicle With the Engine
Running (Automatic Transmission)
{CAUTION:
It can be dangerous to leave your vehicle
with the engine running. Your vehicle
could move suddenly if the shift lever is
not fully in PARK (P) with the parking
brake rmly set. And, if you leave the
vehicle with the engine running, it could
overheat and even catch re. You or
others could be injured. Do not leave your
vehicle with the engine running.
If you have to leave your vehicle with the engine
running, be sure your vehicle is in PARK (P)
and your parking brake is rmly set before you
leave it. After you have moved the shift lever into
PARK (P), hold the regular brake pedal down.
Then, see if you can move the shift lever
away from PARK (P) without rst pressing the shift
lever button. If you can, it means that the shift
lever was not fully locked into PARK (P).
Torque Lock (Automatic Transmission)
If you are parking on a hill and you do not shift
your transmission into PARK (P) properly,
the weight of the vehicle may put too much force
on the parking pawl in the transmission. You
may nd it difficult to pull the shift lever out
of PARK (P). This is called “torque lock.” To
prevent torque lock, set the parking brake and then
shift into PARK (P) properly before you leave
the driver’s seat. To nd out how, seeShifting Into
Park (P) (Automatic Transmission) on page 117.
When you are ready to drive, move the shift
lever out of PARK (P) before you release the
parking brake.
If torque lock does occur, you may need to have
another vehicle push yours a little uphill to
take some of the pressure from the parking pawl
in the transmission, so you can pull the shift
lever out of PARK (P).
118

Shifting Out of Park (P)
(Automatic Transmission)
Your vehicle has an automatic transmission shift
lock control system. You have to apply your
regular brake before you can shift from PARK (P)
when the ignition is in ON. SeeAutomatic
Transmission Operation on page 106.
If you cannot shift out of PARK (P), ease pressure
on the shift lever and push the shift lever all the way
into PARK (P) as you maintain brake application.
Then move the shift lever into the gear you wish.
Press the shift lever button before moving the
shift lever.
Parking Your Vehicle
(Manual Transmission)
Your vehicle has a manual transmission. Before
you get out of your vehicle, move the shift
lever into REVERSE (R), and rmly apply the
parking brake. Once the shift lever has been
placed into REVERSE (R) with the clutch pedal
pressed in, turn the ignition key to LOCK, remove
the key and release the clutch.
If you are parking on a hill, or if your vehicle is
pulling a trailer, seeTowing a Trailer on page 297.
Parking Over Things That Burn
{CAUTION:
Things that can burn could touch hot
exhaust parts under your vehicle and
ignite. Do not park over papers, leaves,
dry grass, or other things that can burn.
119

Running the Engine While Parked
It is better not to park with the engine running. But if
you ever have to, here are some things to know.
{CAUTION:
Idling the engine with the climate control
system off could allow dangerous exhaust
into your vehicle. See the earlier caution
underEngine Exhaust on page 120.
Also, idling in a closed-in place can let
deadly carbon monoxide (CO) into your
vehicle even if the climate control fan is at
the highest setting. One place this can
happen is a garage. Exhaust — with
CO — can come in easily. NEVER park in
a garage with the engine running.
Another closed-in place can be a blizzard.
SeeWinter Driving on page 281.
{CAUTION:
It can be dangerous to get out of your
vehicle if the automatic transmission 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 it is on fairly
level ground, always set the parking brake
and move the automatic transmission
shift lever to PARK (P), or the manual
transmission shift lever to NEUTRAL.
Follow the proper steps to be sure your vehicle will
not move. SeeShifting Into Park (P) (Automatic
Transmission) on page 117andParking Your
Vehicle (Manual Transmission) on page 119.
If you are pulling a trailer with your vehicle, see
Towing a Trailer on page 297.
121

Instrument Panel Overview........................ 152
Hazard Warning Flashers.......................... 154
Other Warning Devices............................. 154
Horn.......................................................... 154
Tilt Wheel.................................................. 154
Turn Signal/Multifunction Lever.................. 155
Turn and Lane-Change Signals................. 156
Headlamp High/Low-Beam Changer.......... 157
Flash-to-Pass............................................ 157
Windshield Wipers..................................... 157
Windshield Washer.................................... 158
Rear Window Wiper/Washer...................... 159
Cruise Control........................................... 159
Exterior Lamps.......................................... 162
Headlamps on Reminder........................... 164
Daytime Running Lamps (DRL)................. 164
Automatic Headlamp System..................... 165
Off-Road Lamps........................................ 166
Fog Lamps................................................ 167
Instrument Panel Brightness...................... 167
Dome Lamp.............................................. 167
Dome Lamp Override................................ 168
Exit Lighting.............................................. 168Reading Lamps......................................... 168
Electric Power Management...................... 168
Battery Run-Down Protection..................... 169
Accessory Power Outlet(s)........................ 169
Ashtray(s) and Cigarette Lighter................ 170
Climate Controls......................................... 170
Climate Control System............................. 170
Outlet Adjustment...................................... 173
Warning Lights, Gages, and Indicators..... 174
Instrument Panel Cluster........................... 175
Speedometer and Odometer...................... 176
Trip Odometer........................................... 176
Tachometer............................................... 176
Safety Belt Reminder Light........................ 177
Passenger Safety Belt Reminder Light....... 177
Airbag Readiness Light............................. 178
Passenger Airbag Status Indicator............. 179
Battery Warning Light................................ 181
Up-Shift Light (Manual Transmission)........ 181
Brake System Warning Light..................... 182
Anti-Lock Brake System
Warning Light........................................ 183
Section 3 Instrument Panel
149

The main components of your instrument panel are the following:
A. Air Outlets. SeeOutlet Adjustment on page 173.
B. Turn Signal/Multifunction Lever. SeeTurn
Signal/Multifunction Lever on page 155.
Windshield Washer/Wiper. SeeWindshield
Wipers on page 157andWindshield Washer
on page 158. Cruise Controls. SeeCruise
Control on page 159.
C. Horn. SeeHorn on page 154.
D. Instrument Panel Cluster. SeeInstrument
Panel Cluster on page 175.
E. Hazard Warning Flasher Button. SeeHazard
Warning Flashers on page 154.
F. All-Wheel Drive, Passenger Air Bag Status
Indicator, Locking Rear Axle, and Traction
Control System/StabiliTrak
®Buttons. See
Full-Time Four-Wheel Drive on page 111,
Passenger Airbag Status Indicator on page 179,
Locking Rear Axle on page 243,Traction
Control System (TCS) on page 241and
StabiliTrak
®System on page 244.
G. Exterior Lamps Control, Dome Override Button,
Instrument Panel Brightness Control, Fog Lamp
Button, and OnStar
®Button. SeeExterior LampsLamps on page 162,Dome Lamp Override
on page 168,Instrument Panel Brightness
on page 167,Fog Lamps on page 167, and
OnStar
®System on page 129.
H. Parking Brake Release. SeeParking Brake
on page 116.
I. Audio System. SeeAudio System(s) on
page 201.
J. Climate Control System. SeeClimate Control
System on page 170.
K. Rear Washer/Wiper Control. SeeRear Window
Wiper/Washer on page 159.
L. Off-Road Lamps Buttons. SeeOff-Road Lamps
on page 166.
M. Shift Lever. SeeAutomatic Transmission
Operation on page 106orManual Transmission
Operation on page 109.
N. Accessory Power Outlets. SeeAccessory
Power Outlet(s) on page 169.
O. Glove Box. SeeGlove Box on page 143.
153

Cruise control will not work if your parking brake is
set, or if the master cylinder brake uid level is low.
If you apply your brakes, the cruise control
shuts off.
{CAUTION:
Cruise control can be dangerous where
you cannot drive safely at a steady speed.
So, do not use your cruise control on
winding roads or in heavy traffic.
Cruise control can be dangerous on
slippery roads. On such roads, fast
changes in tire traction can cause
excessive wheel slip, and you could lose
control. Do not use cruise control on
slippery roads.
The cruise control disengages, if the vehicle has the
Traction Control System (TCS) and it begins to limit
wheel spin. SeeTraction Control System (TCS) on
page 241. When road conditions allow you to safely
use it again, you can turn cruise control back on.
Setting Cruise Control
{CAUTION:
If you leave your cruise control on when
you are not using cruise, you might hit a
button and go into cruise when you do not
want to. You could be startled and even
lose control. Keep the cruise control switch
off until you want to use cruise control.
1. Move the cruise control switch to on.
2. Get up to the speed desired.
3. Press in the set button at the end of the
lever and release it.
4. Take your foot off the accelerator pedal.
The cruise symbol
on the instrument
panel comes on
when the cruise
control is engaged.
160

Resuming a Set Speed
Suppose you set your cruise control at a desired
speed and then you apply the brake or step
on the clutch. This, of course, disengages the
cruise control. But you do not need to reset it.
Once you are going about 25 mph (40 km/h)
or more, you can move the cruise control switch
briey from on to resume/accelerate.
The vehicle will go back to the chosen speed and
stays there.
If you hold the switch at resume/accelerate the
vehicle will keep going faster until you release
the switch or apply the brake. Do not hold
the switch at resume/accelerate, unless you
want the vehicle to go faster.
Increasing Speed While Using
Cruise Control
There are two ways to go to a higher speed:
Use the accelerator pedal to get to the higher
speed. Press the set button at the end of
the lever, then release the button and
the accelerator pedal. You will now cruise
at the higher speed. If the accelerator pedal
is held longer than 60 seconds, cruise
control will turn off.
Move the cruise switch from on to resume/
accelerate. Hold it there until you get up
to the speed you want, and then release the
switch. To increase your speed in very
small amounts, move the switch briey to
resume/accelerate. Each time you do this, your
vehicle goes about 1 mph (1.6 km/h) faster.
Reducing Speed While Using
Cruise Control

Press and hold the set button until you reach
the desired lower speed, then release it.
To slow down in very small amounts, briey
press the set button. Each time you do this,
you will go about 1 mph (1.6 km/h) slower.
Passing Another Vehicle While Using
Cruise Control
Use the accelerator pedal to increase your speed.
When you take your foot off the pedal, your
vehicle slows down to the cruise control speed
you set earlier.
161

Using Cruise Control on Hills
How well your cruise control works on hills depends
upon your speed, load, and the steepness of the
hills. When going up steep hills, you might want
to step on the accelerator pedal to maintain the
vehicle speed. When going downhill, you might
have to brake or shift to a lower gear to keep the
vehicle speed down. Of course, applying the brake
turns off the cruise control. Many drivers nd this
to be too much trouble and do not use cruise control
on steep hills.
Ending Cruise Control
To turn off the cruise control, do one of the following:
Step lightly on the brake pedal.
Move the cruise control switch to off.
Lightly tap or press the clutch, if you have
a manual transmission.
Erasing Speed Memory
When you turn off the cruise control or the ignition,
the cruise control set speed memory is erased.
Exterior Lamps
The control on the driver’s side of your instrument
panel operates the exterior lamps.
O(Exterior Lamps):Turn the knob, located to
the right of this symbol, to choose one of the
four exterior lamp positions.
162