service HUMMER H3 2007 Manual Online

(i)Drain, ush, and rell cooling system. This
service can be complex; you should have
your dealer perform this service. See Engine
Coolant on page 335 for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap,
and ller neck. Pressure test the cooling
system and pressure cap.
(j)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and
repaired and the uid level checked. Add uid if
needed.
(k)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.Owner Checks and Services
These owner checks and services should be
performed at the intervals specied to help
ensure the safety, dependability, and emission
control performance of your vehicle. Your
GM Goodwrench
®dealer can assist you with
these checks and services.
Be sure any necessary repairs are completed at
once. Whenever any uids or lubricants are added
to your vehicle, make sure they are the proper
ones, as shown inRecommended Fluids and
Lubricants on page 440.
435

At Each Fuel Fill
It is important to perform these underhood checks
at each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil
if necessary. SeeEngine Oil on page 323for
further details.
Notice:It is important to check your oil
regularly and keep it at the proper level.
Failure to keep your engine oil at the proper
level can cause damage to your engine
not covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. See
Engine Coolant on page 335for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in
the windshield washer uid reservoir and add
the proper uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your vehicle’s tires and make
sure they are inated to the correct pressures.
Do not forget to check the spare tire. See
Ination - Tire Pressure on page 375. Check to
make sure the spare tire is stored securely.
SeeChanging a Flat Tire on page 391.
Tire Wear Inspection
Tire rotation may be required for high mileage
highway drivers prior to the Engine Oil Life
System service notication. Check the tires for
wear and, if necessary, rotate the tires. See
Tire Inspection and Rotation on page 381.
436

At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough
room around the vehicle.
2. Firmly apply both the parking brake and the
regular brake. SeeParking Brake on page 116.
Do not use the accelerator pedal, and be
ready to turn off the engine immediately if
it starts.3. On automatic transmission vehicles, try to start
the engine in each gear. The vehicle should
start only in PARK (P) or NEUTRAL (N). If the
vehicle starts in any other position, contact
your GM Goodwrench
®dealer for service.
On manual transmission vehicles, put the
shift lever in NEUTRAL (N), push the clutch
pedal down halfway, and try to start the
engine. The vehicle should start only when
the clutch pedal is pushed down all the way
to the oor. If the vehicle starts when the
clutch pedal is not pushed all the way down,
contact your GM Goodwrench
®dealer for
service.
437

Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough
room around the vehicle. It should be parked
on a level surface.
2. Firmly apply the parking brake. SeeParking
Brake on page 116.
Be ready to apply the regular brake
immediately if the vehicle begins to move.3. With the engine off, turn the ignition to ON,
but do not start the engine. Without applying
the regular brake, try to move the shift
lever out of PARK (P) with normal effort. If the
shift lever moves out of PARK (P), contact
your GM Goodwrench
®dealer for service.
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to
turn the ignition to LOCK in each shift lever position.
With an automatic transmission, the ignition
should turn to LOCK only when the shift lever is
in PARK (P). The ignition key should come out
only in LOCK.
With a manual transmission, the ignition key
should come out only in LOCK.
Contact your GM Goodwrench
®dealer if service is
required.
438

Parking Brake and Automatic
Transmission Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your
vehicle could begin to move. You or
others could be injured and property
could be damaged. Make sure there is
room in front of your vehicle in case it
begins to roll. Be ready to apply the
regular brake at once should the vehicle
begin to move.Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular
brake, set the parking brake.
To check the parking brake’s holding ability:
With the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure
from the regular brake pedal. Do this until the
vehicle is held by the parking brake only.
To check the PARK (P) mechanism’s holding
ability: With the engine running, shift to
PARK (P). Then release the parking brake
followed by the regular brake.
Contact your GM Goodwrench
®dealer if service
is required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take
care to clean thoroughly any areas where mud
and other debris can collect.
439

Maintenance Record
After the scheduled services are performed, record the date, odometer reading, who performed the service,
and the type of services performed in the boxes provided. SeeMaintenance Requirements on page 426.
Any additional information fromOwner Checks and Services on page 435can be added on the following
record pages. You should retain all maintenance receipts.
Maintenance Record
DateOdometer
ReadingServiced ByMaintenanceIor
MaintenanceIIServices Performed
444

Maintenance Record (cont’d)
DateOdometer
ReadingServiced ByMaintenanceIor
MaintenanceIIServices Performed
445

Maintenance Record (cont’d)
DateOdometer
ReadingServiced ByMaintenanceIor
MaintenanceIIServices Performed
446

Customer Assistance and Information....... 448
Customer Satisfaction Procedure............... 448
Online Owner Center................................. 451
Customer Assistance for Text
Telephone (TTY) Users.......................... 452
Customer Assistance Offices..................... 452
GM Mobility Reimbursement Program........ 453
Roadside Assistance Program................... 454
Courtesy Transportation............................. 456
Vehicle Data Collection and
Event Data Recorders............................ 458
Collision Damage Repair........................... 460Reporting Safety Defects............................ 464
Reporting Safety Defects to the
United States Government..................... 464
Reporting Safety Defects to the
Canadian Government............................ 464
Reporting Safety Defects to
General Motors...................................... 464
Service Publications Ordering
Information............................................. 465
Section 7 Customer Assistance Information
447

Customer Assistance and
Information
Customer Satisfaction Procedure
Your satisfaction and goodwill are important
to your dealer and to HUMMER. Normally, any
concerns with the sales transaction or the
operation of your vehicle will be resolved by your
dealer’s sales or service departments. Sometimes,
however, despite the best intentions of all
concerned, misunderstandings can occur. If
your concern has not been resolved to your
satisfaction, the following steps should be taken:
STEP ONE:Discuss your concern with a member
of dealership management. Normally, concerns
can be quickly resolved at that level. If the matter
has already been reviewed with the sales,
service or parts manager, contact the owner of
the dealership or the general manager.STEP TWO:If after contacting a member of
dealership management, it appears your concern
cannot be resolved by the dealership without further
help, contact the HUMMER Consumer Relations
Manager by calling 1-866-HUMMER6 (486-6376),
Customer Assistance prompt. In Canada, contact
GM of Canada Customer Communication Centre in
Oshawa by calling 1-800-263-3777 (English) or
1-800-263-7854 (French).
We encourage you to call the toll-free number in
order to give your inquiry prompt attention. Please
have the following information available to give the
Customer Assistance Representative:
Vehicle Identication Number (VIN). This is
available from the vehicle registration or title, or
the plate at the top left of the instrument panel
and visible through the windshield.
Dealership name and location
Vehicle delivery date and present mileage
448