2008 HUMMER H2 automatic transmission

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition to LOCK/OFF in each shift lever position.
The ignition should turn to LOCK/OFF only
when the shift lever is in PARK (P).
The ignition key should come out only in
LOCK/OFF.
Contact your dealer/retailer if service is required.
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 the 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 dealer/retailer 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.
6-11

Recommended Fluids and
Lubricants
Fluids and lubricants identied below by name, part
number, or specication can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine OilEngine oil which meets
GM Standard GM6094M and
displays the American Petroleum
Institute Certied for Gasoline
Engines starburst symbol. To
determine the proper viscosity for
your vehicle’s engine, seeEngine
Oil on page 5-13.
Engine Coolant50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant on
page 5-24.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake uid.
Windshield
WasherOptikleen
®Washer Solvent.
Usage Fluid/Lubricant
Power Steering
SystemGM Power Steering Fluid
(GM Part No. U.S. 89021184,
in Canada 89021186).
Automatic
TransmissionDEXRON
®-VI Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474).
Chassis
LubricationChassis Lubricant
(GM Part No. U.S. 12377985, in
Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Front and
Rear AxleSAE 75W-90
Synthetic Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678) meeting
GM Specication 9986115.
Transfer CaseDEXRON
®-VI Automatic
Transmission Fluid.
Front Axle
Propshaft
SplineSpline Lubricant, Special Lubricant
(GM Part No. U.S. 12345879,
in Canada 10953511) or
lubricant meeting requirements
of GM 9985830.
6-12

Audio System (cont.)
Radio Reception........................................3-117
Rear Seat Audio (RSA)...............................3-114
Setting the Clock.........................................3-73
Theft-Deterrent Feature...............................3-116
XM™ Satellite Radio Antenna System...........3-118
Audio System(s).............................................3-75
Automatic Headlamp System............................3-18
Automatic Transmission
Fluid..........................................................5-21
Operation...................................................2-32
B
Battery..........................................................5-39
Run-Down Protection...................................3-19
Brake
Emergencies................................................ 4-5
Brakes..........................................................5-36
System Warning Light..................................3-38
Braking........................................................... 4-3
Braking in Emergencies..................................... 4-5
Break-In, New Vehicle.....................................2-28
Bulb Replacement...........................................5-48
Daytime Running Lamps...............................5-50
Front Turn Signal and Parking Lamps.............5-49
Halogen Bulbs............................................5-48
Headlamps.................................................5-48Bulb Replacement (cont.)
Replacement Bulbs......................................5-53
Roof Marker Lamps.....................................5-50
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps........................................5-51
Buying New Tires...........................................5-70
C
Calibration.....................................................2-45
California Fuel.................................................. 5-5
California Perchlorate Materials Requirements....... 5-4
California Proposition 65 Warning....................... 5-3
Canadian Owners................................................ ii
Capacities and Specications..........................5-117
Carbon Monoxide...........2-14, 2-16, 2-43, 4-36, 4-55
Care of
Safety Belts..............................................5-103
Cargo Area, All-Weather..................................2-66
Cargo Tie Downs............................................2-65
CD, MP3 ...............................................3-94, 3-98
Center Console Storage Area...........................2-64
Chains, Tire...................................................5-75
Charging System Light....................................3-37
Check
Engine Light...............................................3-42
Checking Things Under the Hood....................... 5-9
Chemical Paint Spotting.................................5-107
2

Towing
Recreational Vehicle.....................................4-51
Towing a Trailer..........................................4-55
Your Vehicle...............................................4-51
Traction
Control System (TCS).................................... 4-5
StabiliTrak
®System....................................... 4-7
Trailer
Recommendations.......................................4-67
Transmission
Fluid, Automatic...........................................5-21
Transmission Operation, Automatic....................2-32
Trip Odometer................................................3-33
Turn and Lane-Change Signals.......................... 3-8
Turn Signal/Multifunction Lever........................... 3-7
U
Uniform Tire Quality Grading............................5-72
Universal Home Remote System.......................2-57
Operation...................................................2-57
Using this Manual............................................... iii
V
Vehicle
Control........................................................ 4-3
Damage Warnings........................................... iv
Loading......................................................4-44
Symbols......................................................... iv
Vehicle Customization, DIC..............................3-63
Vehicle Data Recording and Privacy..................7-16
Vehicle Identication
Number (VIN)............................................5-109
Service Parts Identication Label..................5-109
Vehicle, Remote Start....................................... 2-8
Ventilation Adjustment......................................3-29
Visors...........................................................2-23
Voltmeter Gage..............................................3-37
13