2008 HUMMER H2 ECU

Notice:The wrong wheel can also cause problems
with bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper height,
vehicle ground clearance, and tire or tire chain
clearance to the body and chassis.
SeeChanging a Flat Tire on page 5-78for more
information.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has been
used or how far it has been driven. It could fail
suddenly and cause a crash. If you have to
replace a wheel, use a new GM original
equipment wheel.
Tire Chains
Notice:Use tire chains only where legal and only
when you must. Use only SAE Class U-type
chains that are the proper size for your tires. Install
them on the rear axle tires and tighten them as
tightly as possible with the ends securely fastened.
Drive slowly and follow the chain manufacturer’s
instructions. If you can hear the chains contacting
your vehicle, stop and retighten them. If the contact
continues, slow down until it stops. Driving too
fast or spinning the wheels with chains on will
damage your vehicle.
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6. Turn the wheel wrench clockwise to raise the jack
head to the lifting point.
7.Front Flat Tire:Position the jack under the vehicle
on the front lower control arm behind the at tire.Rear Flat Tire:Place the jack under the curved
rear axle pad. Make sure the jack head is positioned
so that the rear axle pad is resting securely on
the jack head.
{CAUTION:
Getting under a vehicle when it is jacked up is
dangerous. If the vehicle slips off the jack, you
could be badly injured or killed. Never get under
a vehicle when it is supported only by a jack. Front Flat Tire – Jack
Rear Flat Tire – Jack
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Storing a Flat or Spare Tire and
Tools (SUT)
Storing the Flat or Spare Tire
Use the following art and text to help you store the
spare or at tire back into its proper location when you
are done.
To store the at or spare tire on the tire carrier:
1. Close the tire carrier. SeeTailgate/Spare Tire
Carrier on page 2-16for tire carrier operation.
2. Place the at or spare tire onto the tire carrier with
the outside of the wheel facing you.
3. Reinstall the three nuts holding spare or at tire to
the tire carrier. Tighten the nuts by hand.4. Use the wheel wrench and the wheel wrench
extension to tighten the nuts rmly. Try to move the
tire back and forth slightly to be sure it is secure.
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5. Slide the license plate holder onto the spare or at
tire. Secure it from the back of the tire carrier with
the wing nut.
If you choose not to reinstall the spare or at tire on
the vehicle, you will still need to reinstall the
license plate holder on the spare tire carrier.
Storing the Jack and Tools
To store the jack and tools:
1. Lower the jack completely.
2. Place the jack in the mounting bracket.
3. Turn the hole at the top of the jack clockwise until
the jack is held tight in the mounting bracket.
4. Push and pull on the jack and retighten if necessary
to make sure the jack is secure.
5. Place the wheel blocks in the tool bag.
6. Place the remaining tools in the tool bag.
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5. Try to move the tire back and forth slightly to make
sure it is secure.
6. Slide the license plate holder onto the spare or at
tire. Secure it from the back of the tire carrier with
the wing nut.
If you choose not to reinstall the spare or at tire on
the vehicle, you still need to reinstall the license
plate holder on the spare tire carrier.
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Storing the Jack and Tools
To store the jack and tools:
1. Lower the jack completely.
2. Place the jack in the mounting bracket.
3. Turn the hole at the top of the jack clockwise until
the jack is held tight in the mounting bracket.
4. Push and pull on the jack and retighten if necessary
to make sure the jack is secure.
5. Place the wheel blocks in the tool bag.
6. Place the remaining tools in the tool bag.7. Replace the trim cover. Make sure the latches are
pushed down.
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8. Place the narrow end of the tool bag under the
seat rails as shown and slide the tool bag under
the rear seat.
Be careful not to pinch the seat cables or electrical
harnesses.
9. Reinstall the strap to the seat rail for the tool bag.
Wrap the strap around the seat rail and then
secure it to the tool bag.
10. Return the seat to the correct position. SeeSplit
Folding Rear Seat on page 1-8for more information.
Spare Tire
Your vehicle, when new, had a fully-inated spare tire.
A spare tire may lose air over time, so check its
ination pressure regularly. SeeInflation - Tire Pressure
on page 5-61andLoading Your Vehicle on page 4-44
for information regarding proper tire ination and loading
your vehicle. For instruction on how to remove, install
or store a spare tire, seeRemoving the Flat Tire
and Installing the Spare Tire on page 5-88andStoring
a Flat or Spare Tire and Tools (SUT) on page 5-94
orStoring a Flat or Spare Tire and Tools (SUV)
on page 5-96.
After installing the spare tire on your vehicle, you should
stop as soon as possible and make sure the spare is
correctly inated. The spare tire is made to perform well
at speeds up to 70 mph (112 km/h) at the recommended
ination pressure, so you can nish your trip.
Have the damaged or at road tire repaired or replaced
as soon as you can and installed back onto your
vehicle. This way, a spare tire will be available in case
you need it again. Do not mix tires and wheels of
different sizes, because they will not t. Keep your spare
tire and its wheel together.
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At Each Fuel Fill
It is important to perform these underhood checks at
each fuel fill.
Engine Oil Level Check
Notice:It is important to check the engine oil
regularly and keep it at the proper level. Failure to
keep the engine oil at the proper level can cause
damage to the engine not covered by your warranty.
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-13.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-24.
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
Inspect your vehicle’s tires and make sure they are
inated to the correct pressures. Do not forget to
check the spare tire. SeeInflation - Tire Pressure on
page 5-61. Check to make sure the spare tire is stored
securely. SeeChanging a Flat Tire on page 5-78.
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. SeeTire Inspection and Rotation on
page 5-67.
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