2004 HUMMER H2 lock

A. Coolant Surge Tank. SeeCooling System on
page 5-30andCoolant Surge Tank Pressure Cap
on page 5-27.
B. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-19.
C. Windshield Washer Fluid Reservoir. SeeWindshield
Washer Fluid on page 5-37.
D. Engine Oil Fill. SeeEngine Oil on page 5-14.
E. Engine Oil Dipstick. SeeEngine Oil on page 5-14.
F. Automatic Transmission Dipstick. SeeAutomatic
Transmission Fluid on page 5-21.
G. Fan. SeeCooling System on page 5-30andEngine
Fan Noise on page 5-35.H. Remote Negative (−) Terminal (GND). SeeJump
Starting on page 5-43.
I. Power Steering Fluid Reservoir (Out of View). See
Power Steering Fluid on page 5-36.
J. Remote Positive (+) Terminal. SeeJump Starting on
page 5-43.
K. Brake Fluid Reservoir. SeeBrakes on page 5-38.
L. Underhood Fuse Block. See “Underhood Fuse Block”
underFuses and Circuit Breakers on page 5-102.
M. Battery. SeeBattery on page 5-42.
Before closing the hood, be sure all ller caps are on
properly. Pull down the hood and close it rmly.
5-13

How to Reset the CHANGE ENGINE OIL
Message
The GM Oil Life System calculates when to change
your engine oil and lter based on vehicle use. Anytime
your oil is changed, reset the system so it can
calculate when the next oil change is required. If a
situation occurs where you change your oil prior to a
CHANGE ENGINE OIL message being turned on, reset
the system.
To reset the CHANGE ENGINE OIL message, see “GM
Oil Life System” underDIC Operation and Displays
on page 3-44for vehicles equipped with the DIC, or do
the following:
1. Turn the ignition key to RUN with the engine off.
2. Fully press and release the accelerator pedal slowly
three times within ve seconds.
If the OIL LIFE RESET message ashes for
10 seconds, the system is resetting.
3. Turn the key to LOCK.
If the CHANGE ENGINE OIL message comes back on
when you start your vehicle, the engine oil life system
has not reset. Repeat the procedure. If it still does
not reset, see your dealer for service.
What to Do with Used Oil
Used engine oil contains certain elements that may be
unhealthy for your skin and could even cause cancer.
Do not let used oil stay on your skin for very long. Clean
your skin and nails with soap and water, or a good
hand cleaner. Wash or properly dispose of clothing or
rags containing used engine oil. See the manufacturer’s
warnings about the use and disposal of oil products.
Used oil can be a threat to the environment. If you
change your own oil, be sure to drain all the oil from the
lter before disposal. Never dispose of oil by putting it in
the trash, pouring it on the ground, into sewers, or into
streams or bodies of water. Instead, recycle it by taking it
to a place that collects used oil. If you have a problem
properly disposing of your used oil, ask your dealer, a
service station or a local recycling center for help.
5-18

3. Check both sides of the dipstick, and read the lower
level. The uid level must be in the COLD area,
below the cross-hatched area, for a cold check or in
the HOT area or cross-hatched area for a hot
check. Be sure to keep the dipstick pointed down to
get an accurate reading.
4. If the uid level is in the acceptable range, push the
dipstick back in all the way; then ip the handle
down to lock the dipstick in place.
How to Add Fluid
Refer to the Maintenance Schedule to determine what
kind of transmission uid to use. SeeRecommended
Fluids and Lubricants on page 6-12.
Add uid only after checking the transmission uid while it
is hot. (A cold check is used only as a reference.) If the
uid level is low, add only enough of the proper uid to
bring the level up to the HOT area for a hot check. It
doesn’t take much uid, generally less than one pint
(0.5 L).Don’t overll.
Notice:We recommend you use only uid labeled
DEXRON
®-III, because uid with that label is
made especially for your automatic transmission.
Damage caused by uid other than DEXRON
®-III is
not covered by your new vehicle warranty.
After adding uid, recheck the uid level as
described underHow to Check.
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.
5-23

{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will.
Yourvehicle’s coolant warning system is set
for the proper coolant mixture. With plain
water or the wrong mixture, your engine could
get too hot but you would not get the overheat
warning. Your engine could catch re and you
or others could be burned. Use a 50/50 mixture
of clean, drinkable water and DEX-COOL
®
coolant.
Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
1. Park the vehicle on a level surface.
2. Locate the coolant
surge tank pressure
cap that has this label.
You can remove the coolant surge tank pressure
capwhen the cooling system, including the
coolant surge tank pressure cap and upper radiator
hose, are no longer hot. Turn the pressure cap
slowly counterclockwise (left) about one full turn. If
you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.
5-33

Bulb Replacement
SeeReplacement Bulbs on page 5-58for the proper
type of bulbs to use.
For any bulb changing procedure not listed in this
section, contact your dealer.
Halogen Bulbs
{CAUTION:
Halogen bulbs have pressurized gas inside and
can burst if you drop or scratch the bulb. You or
others could be injured. Be sure to read and
follow the instructions on the bulb package.
Headlamps
1. Open the hood as described earlier underHood
Release on page 5-10and locate the affected
headlamp on the inner front portion of the hood.2. Turn the bulb/socket
retainer (arrow)
counterclockwise to
unlock the bulb/socket.
You may prefer to
unplug the electrical
connector before
removing the bulb/
socket. If so, complete
Step 4 before doing
this step.
3. Pull the bulb/socket
straight out from the
headlamp housing.
5-52

4. Unplug the electrical
connector.
5. Push the new bulb/socket into the headlamp
assembly making sure to align the splines on
the bulb/socket with the splines in the headlamp
housing. Use care not to touch the bulb with
your ngers or hands.
6. Turn the bulb/socket retainer clockwise to lock the
bulb/socket in place.
7. Plug in the electrical connector.Front Turn Signal and Parking
Lamps
1. Open the hood as described earlier underHood
Release on page 5-10and locate the affected lamp.
2. Turn the bulb socket
counterclockwise and
remove it from the lamp
housing.
3. Pull the bulb from the bulb socket.
4. Put the new bulb into the bulb socket.
5. Put the bulb socket into the lamp housing and turn
it clockwise until it locks.
5-53

Sidemarker Lamps
It is recommended that these components be replaced
by your dealer.
Daytime Running Lamps
1. Locate the lamp
assembly behind the
front bumper. It is
easiest to come in from
the side of the
vehicle through the
wheel opening.2. Turn the bulb socket
counterclockwise and
remove it from the lamp
housing.
3. Remove the bulb from the bulb socket.
4. Put the new bulb into the bulb socket.
5. Put the bulb socket into the lamp housing and turn
it clockwise until it locks.
5-54

Roof Marker Lamps
Corner Roof Marker Lamps
1. Remove the screw and lift off the lens.2. Turn the socket counterclockwise to remove it and
remove the old bulb.
3. Put a new bulb into the socket.
4. Reinstall the socket into the lens and turn it
clockwise to lock it into place.
5. Hook the side of the lens with the hook end in the
notch rst and then tighten the screw.
5-55