warning light HUMMER H2 2007 Owner's Manual

Selectable Extended Rear Ride
Height
If your vehicle has this feature it comes as part
of the electronically controlled air suspension
system.
The selectable rear ride height allows you to raise
the rear of the vehicle about 2 inches (5 cm)
over the normal ride height. This can be helpful
when driving off-road where you may need
more ground clearance to clear an obstacle.
The button that controls
this feature is located
on the instrument panel
to the right of the
steering wheel.To use this feature, ensure that the following
conditions are met:
The engine must be running.
All doors must be fully closed. The suspension
will not raise or lower if a door is open.
The vehicle speed must be less than 40 mph
(64 km/h). The system will not activate
otherwise.
Press the height control button to raise the rear of
the vehicle.
A light in the button will begin to ash as the rear
of the vehicle rises. Once the extended height
has been reached (this may take up to a minute),
the warning light will stop ashing and will stay
lit while the vehicle is at the extended height.
371

You may also hear the release of air similar to a
hissing sound during suspension operation.
This is normal.
Load leveling will not function normally with the
inator hose attached to the inator outlet.
Remove the inater hose from the outlet when
it is not in use. SeeAccessory Inator on
page 466.
Overload and Overheat Protection
Overload protection is designed to protect the air
suspension system and is an indication to the
driver that the vehicle is overloaded.
If the rear suspension remains at a low height, the
rear axle load has exceeded GAWR (Gross Axle
Weight Rating). When the overload protection
mode is activated, the compressor operates forabout 30 seconds to one minute without raising the
vehicle depending on the amount of overload.
This will continue each time the ignition is turned on
until the rear axle load is reduced below GAWR.
If the total rear GAWR (Gross Axle Weight Rating)
is reached, the suspension may be slightly less
than level. This is normal and does not mean there
is a problem with the air suspension.
If the system overheats due to normal operation,
the SERVICE AIR SUSPENSION message
will not be displayed on the DIC, but the system
will shut down and stop all leveling functions until it
cools down. If the system overheats and sets
the SERVICE AIR SUSPENSION message in the
DIC, then there is a fault. SeeDIC Warnings
and Messages on page 226for more information.
373

Notice:Use of the incorrect automatic
transmission uid may damage your vehicle,
and the damages may not be covered by
your warranty. Always use the automatic
transmission uid listed inRecommended
Fluids and Lubricants on page 528.
After adding uid, recheck the uid level as
described under “How to Check Automatic
Transmission Fluid,” earlier in this section.
When the correct uid level is obtained, push
the dipstick back in all the way; then ip the
handle down to lock the dipstick in place.
Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is
designed to remain in your vehicle for ve years or
150,000 miles (240 000 km), whichever occurs rst,
if you add only DEX-COOL
®extended life coolant.
The following explains your cooling system and
how to add coolant when it is low. If you have a
problem with engine overheating, seeEngine
Overheating on page 418.A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down to
−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as
they should.
Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core,
or radiator corrosion. In addition, the engine
coolant may require changing sooner, at
the rst maintenance service after each
30,000 miles (50 000 km) or 24 months,
whichever occurs rst. Any repairs would not
be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your
vehicle.
415

Uniform Tire Quality Grading
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration (NHTSA), which
grades tires by treadwear, traction, and
temperature performance. This applies only to
vehicles sold in the United States. The grades are
molded on the sidewalls of most passenger car
tires. The Uniform Tire Quality Grading (UTQG)
system does not apply to deep tread, winter-type
snow tires, space-saver, or temporary use
spare tires, tires with nominal rim diameters of
10 to 12 inches (25 to 30 cm), or to some
limited-production tires.
While the tires available on General Motors
passenger cars and light trucks may vary with
respect to these grades, they must also conform to
federal safety requirements and additional General
Motors Tire Performance Criteria (TPC) standards.
Treadwear
The treadwear grade is a comparative rating based
on the wear rate of the tire when tested under
controlled conditions on a specied government
test course. For example, a tire graded 150 would
wear one and a half (1.5) times as well on the
government course as a tire graded 100. The
relative performance of tires depends upon the
actual conditions of their use, however, and may
depart signicantly from the norm due to variations
in driving habits, service practices, and differences
in road characteristics and climate.
Traction – AA, A, B, C
The traction grades, from highest to lowest, are AA,
A, B, and C. Those grades represent the tire’s
ability to stop on wet pavement as measured under
controlled conditions on specied government test
surfaces of asphalt and concrete. A tire marked C
may have poor traction performance.
Warning:The traction grade assigned to this tire
is based on straight-ahead braking traction
tests, and does not include acceleration, cornering,
hydroplaning, or peak traction characteristics.
462

A
Accessories and Modications..................... 392
Accessory Inator........................................ 466
Accessory Power Outlet(s).......................... 196
Adding Equipment to Your
Airbag-Equipped Vehicle............................ 89
Additives, Fuel............................................ 395
Add-On Electrical Equipment....................... 503
Air Cleaner/Filter, Engine............................. 409
Air Conditioning........................................... 197
Air Suspension............................................ 372
Airbag
Off Light.................................................. 208
Readiness Light....................................... 207
Airbag Sensing and Diagnostic
Module (SDM).......................................... 546
Airbag System............................................... 77
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 89
Airbag Off Switch....................................... 84
How Does an Airbag Restrain?.................. 82
Servicing Your Airbag-Equipped Vehicle..... 88
What Makes an Airbag Inate?.................. 82Airbag System (cont.)
What Will You See After an
Airbag Inates?...................................... 83
When Should an Airbag Inate?................. 81
Where Are the Airbags?............................. 79
Antenna, Fixed Mast................................... 300
Antenna, XM™ Satellite Radio
Antenna System....................................... 300
Anti-Lock Brake System (ABS).................... 307
Anti-Lock Brake, System Warning Light....... 212
Appearance Care
Aluminum Wheels.................................... 498
Care of Safety Belts................................ 495
Chemical Paint Spotting........................... 500
Cleaning Exterior Lamps/Lenses.............. 497
Cleaning the Inside of Your Vehicle.......... 491
Fabric/Carpet........................................... 493
Finish Care.............................................. 497
Finish Damage......................................... 499
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 494
Leather.................................................... 494
Sheet Metal Damage............................... 499
Speaker Covers....................................... 495
555

Appearance Care (cont.)
Tires........................................................ 499
Underbody Maintenance........................... 500
Vehicle Care/Appearance Materials.......... 501
Washing Your Vehicle.............................. 495
Weatherstrips........................................... 495
Windshield, Backglass, and
Wiper Blades........................................ 498
Wood Panels........................................... 495
Ashtray(s).................................................... 197
Assist Steps................................................ 338
Audio System(s).......................................... 241
Audio Steering Wheel Controls................. 296
Care of Your Cassette Tape Player.......... 297
Care of Your CD and DVD Player............ 300
Care of Your CDs and DVDs................... 299
Chime Level Adjustment........................... 300
Fixed Mast Antenna................................. 300
Navigation/Radio System,
see Navigation Manual......................... 271
Radio with Cassette and CD.................... 243
Radio with Six-Disc CD............................ 256
Rear Seat Audio (RSA)............................ 294
Setting the Time...................................... 243Audio System(s) (cont.)
Theft-Deterrent Feature............................ 295
Understanding Radio Reception............... 297
XM™ Satellite Radio Antenna System........ 300
Automatic Headlamp System....................... 189
Automatic Transmission
Fluid........................................................ 412
Operation................................................. 124
B
Battery........................................................ 431
Run-Down Protection............................... 192
Before Leaving on a Long Trip.................... 349
Bench Seat, Split (60/40).............................. 15
Brake
Anti-Lock Brake System (ABS)................. 307
Emergencies............................................ 309
Parking.................................................... 133
System Warning Light.............................. 211
Brakes........................................................ 427
Braking....................................................... 306
Braking in Emergencies............................... 309
Break-In, New Vehicle................................. 119
556

Bulb Replacement....................................... 441
Daytime Running Lamps.......................... 443
Front Turn Signal and Parking Lamps......... 442
Halogen Bulbs......................................... 441
Headlamps............................................... 441
Replacement Bulbs.................................. 446
Roof Marker Lamps................................. 443
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps..................................... 444
Buying New Tires........................................ 460
C
Calibration................................................... 139
California Fuel............................................. 395
California Proposition 65 Warning................ 393
Canadian Owners........................................... 3
Capacities and Specications...................... 512
Carbon Monoxide.............104, 105, 108, 137,
353, 374
Care of
Safety Belts............................................. 495
Your Cassette Tape Player....................... 297
Your CD and DVD Player........................ 300
Your CDs and DVDs................................ 299Cargo Area, All-Weather .............................. 165
Cargo Tie Downs........................................ 165
Center Console Storage Area...................... 160
Center Overhead Console........................... 160
Chains, Tire................................................. 465
Charging System Light................................ 209
Check
Engine Light............................................ 215
Checking Things Under the Hood ................ 400
Chemical Paint Spotting .............................. 500
Child Restraints
Child Restraint Systems............................. 53
Infants and Young Children........................ 49
Lower Anchors and Tethers for
Children.................................................. 59
Older Children........................................... 46
Securing a Child Restraint in a
Rear Seat Position................................. 69
Securing a Child Restraint in the
Right Front Seat Position........................ 71
Where to Put the Restraint........................ 57
Chime Level Adjustment .............................. 300
Cigarette Lighter.......................................... 197
557

Electrical System (cont.)
Underhood Fuse Block............................. 507
Windshield Wiper Fuses........................... 503
Electronically Controlled Air Suspension
System.................................................... 372
Engine
Air Cleaner/Filter...................................... 409
Battery..................................................... 431
Check and Service Engine Soon Light........ 215
Coolant.................................................... 415
Coolant Heater......................................... 123
Coolant Temperature Gage...................... 213
Drive Belt Routing.................................... 531
Engine Compartment Overview................ 402
Exhaust................................................... 137
Oil ........................................................... 404
Oil Life System........................................ 407
Overheated Protection Operating Mode...... 420
Overheating............................................. 418
Starting.................................................... 121
Entry/Exit Lighting....................................... 191
Event Data Recorders (EDR)...................... 546
Extender, Safety Belt..................................... 45
Exterior Lamps............................................ 186F
Filter
Engine Air Cleaner................................... 409
Finish Damage............................................ 499
First Aid Kit................................................. 360
Fixed Mast Antenna.................................... 300
Flashers, Hazard Warning........................... 176
Flash-to-Pass.............................................. 180
Flat Tire...................................................... 468
Flat Tire, Changing...................................... 468
Flat Tire, Storing.................................485, 488
Fluid
Automatic Transmission............................ 412
Power Steering........................................ 425
Windshield Washer.................................. 426
Four-Wheel Drive........................................ 438
Four-Wheel Drive, Full-Time........................ 128
Front Axle................................................... 440
Front Mounted Receiver.............................. 360
Fuel............................................................ 394
Additives.................................................. 395
California Fuel.......................................... 395
Filling a Portable Fuel Container.............. 399
560

Fuel (cont.)
Filling Your Tank...................................... 397
Fuels in Foreign Countries....................... 396
Gage....................................................... 221
Gasoline Octane...................................... 394
Gasoline Specications............................ 394
Low Warning Light................................... 221
Fuses
Center Instrument Panel Fuse Block........ 506
Fuses and Circuit Breakers...................... 504
Instrument Panel Fuse Block................... 504
Underhood Fuse Block............................. 507
Windshield Wiper..................................... 503
G
Gage
Engine Coolant Temperature.................... 213
Fuel......................................................... 221
Oil Pressure............................................. 218
Speedometer........................................... 206
Tachometer.............................................. 206
Transmission Temperature........................ 213
Voltmeter Gage........................................ 210Garage Door Opener..........................148, 149
Gasoline
Octane..................................................... 394
Specications........................................... 394
Glove Box................................................... 160
GM Mobility Reimbursement Program.......... 541
H
Hazard Warning Flashers............................ 176
Head Restraints............................................ 14
Headlamps.................................................. 441
Automatic Headlamp System.................... 189
Bulb Replacement.................................... 441
Daytime Running Lamps.................188, 443
Flash-to-Pass........................................... 180
Front Turn Signal and Parking Lamps......... 442
Halogen Bulbs......................................... 441
High/Low Beam Changer......................... 179
On Reminder........................................... 188
Roof Marker Lamps................................. 443
Heated Seats................................................ 10
Heater......................................................... 197
Highbeam On Light..................................... 220
561

Highway Hypnosis....................................... 350
Hill and Mountain Roads............................. 351
Hood
Checking Things Under............................ 400
Release................................................... 400
Horn............................................................ 177
How to Use This Manual................................ 4
How to Wear Safety Belts Properly............... 29
I
Ignition Positions......................................... 120
Infants and Young Children, Restraints.......... 49
Ination - Tire Pressure............................... 456
Instrument Panel
Overview.................................................. 174
Instrument Panel (I/P)
Brightness................................................ 191
Cluster..................................................... 205
J
Jump Starting.............................................. 432
K
Keyless Entry System................................... 96
Keys............................................................. 95
L
Labeling, Tire Sidewall................................. 449
Lamps
Battery Run-Down Protection................... 192
Dome....................................................... 191
Dome Lamp Override............................... 191
Exterior.................................................... 186
Off-Road.................................................. 190
Reading................................................... 192
LATCH System
Child Restraints......................................... 59
Liftgate........................................................ 104
Light
Airbag Off................................................ 208
Airbag Readiness..................................... 207
Anti-Lock Brake System Warning............. 212
Brake System Warning............................. 211
Charging System..................................... 209
Cruise Control.......................................... 220
562