2006 HUMMER H3 ECU

4. Unplug the electrical connector by pushing the
release tab and pulling the bulb socket out.
5. Replace with a new bulb socket.
6. Reinstall the electrical connector.
7. Reinstall the bulb socket into the headlamp
assembly making sure to align the tabs on the bulb
socket with the tabs in the headlamp housing.
8. Turn the bulb socket clockwise to secure it.Taillamps, Turn Signal, Stoplamps
and Back-up Lamps
A. Stoplamp, Taillamp and
Turn Signal Lamp
B. Back-up Lamp
To replace one of these bulbs in the taillamp assembly,
do the following:
1. Open the swing-gate. SeeSwing-gate on page 2-9
for more information.
5-50

Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for wear
and cracking. SeeScheduled Maintenance on page 6-4
for more information.
Replacement blades come in different types and are
removed in different ways. For proper type and length, see
Normal Maintenance Replacement Parts on page 6-13.
To replace the windshield wiper blade assembly do the
following:
1. Lift the wiper arm away from the windshield.2. Push the release lever (B) to disengage the hook
and push the wiper arm (A) out of the blade (C).
3. Push the new wiper blade securely on the wiper arm
until you hear the release lever click into place.
To replace the rear wiper blade, follow the steps listed
above.
5-52

Tire Chains
{CAUTION:
If your vehicle has LT285/75R16 size tires,
do not use tire chains. They can damage your
vehicle because there is not enough clearance.
Tire chains used on a vehicle without the
proper amount of clearance can cause damage
to the brakes, suspension or other vehicle
parts. The area damaged by the tire chains
could cause you to lose control of your vehicle
and you or others may be injured in a crash.
Use another type of traction device only if its
manufacturer recommends it for use on your
vehicle and tire size combination and road
conditions. Follow that manufacturer’s
instructions. To help avoid damage to your
vehicle, drive slowly, readjust or remove the
device if it is contacting your vehicle, and do
not spin your vehicle’s wheels.
If you do nd traction devices that will t,
install them on the rear tires.Notice:If your vehicle has a tire size other than
LT285/75R16 use tire chains only where legal
and only when you must. Use chains that are the
proper size for your tires. Install them on the tires of
the rear axle. Do not use chains on the tires of the
front axle. 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.
5-71

Removing the Spare Tire and Tools
The equipment you will need is located in the
swing-gate, behind a cover. To remove the equipment,
do the following:
1. Open the swing-gate. SeeSwing-gate on page 2-9
for more information.
2. Remove the cover by lifting the two latches.
3. Turn the wing nut counterclockwise to release the
jack tool bag and jack.
4. Remove the tool bag and jack from its compartment.5. Undo the straps that secure the jack tool bag to
the jack.
6. Open the tool bag and you will nd the following
tools, which you will use to remove the spare tire
and at tire:
A. Wheel Wrench
B. Jack Handle
ExtensionsC. Jack Handle
D. Jack
E. Wheel Blocks
5-75

The spare tire is attached to the swing-gate. To remove
the spare tire, do the following:
1. Remove the center cap
by placing the at end
of the wheel wrench
in the slot on the wheel
and gently pry the
center cap out.2. Use the wheel wrench
to remove the wheel
nuts securing the
spare tire.
If your vehicle has
locking lug nuts,
the key is supplied
in the tool bag.
Use the key along with
the wheel wrench to
remove the wheel nuts
from the tire.
3. Pull off and gently lower the spare tire to the
ground. Set it next to the at tire.
In order to remove the spare tire, you may need
someone to assist you.
5-76

4. Use the wheel wrench
to tighten the nuts
rmly. Try to move the
tire back and forth
slightly to be sure it is
secure.
5. Reinstall the center tire cover onto the spare or
at tire.To store the jack tool bag and jack, follow these
procedures:
1. Return the tools to the jack tool bag.
2. Secure the tool bag to the jack by securely wrapping
the straps around the jack. Then, slide the straps
through the rings on the bag and secure.
3. Position the jack and jack tool bag in the
swing-gate.
When reinstalling the jack and jack tool bag, make
sure the jack base is securely seated behind
the tabs in the swing-gate.
5-83

4. Reinstall the wing nut retainer to fasten the jack
and tool bag in the storage compartment.
Make sure that the wing nut passes through the tool
bag and the jack before you tighten it.
5. Turn the wing nut retainer clockwise to secure.
6. Reinstall the compartment cover by inserting
the locator tabs in the holes in the swing-gate.
Push the latches down to secure.
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. SeeInation - Tire Pressure
on page 5-60andLoading Your Vehicle on page 4-52
for information regarding proper tire ination and loading
your vehicle. For instruction on how to remove, install
or store a spare tire, seeChanging a Flat Tire on
page 5-73andRemoving the Flat Tire and Installing the
Spare Tire on page 5-77.
After installing the spare tire on your vehicle, you should
stop as soon as possible and make sure the spare is
correctly inated. 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.
Your vehicle may have a different size spare tire than
the road tires that were originally installed on your
vehicle. This spare tires was developed for use on your
vehicle, so it’s all right to drive on it.
If your vehicle has a spare tire that does not match your
vehicle’s original road tires and wheels in size and
type, do not include the spare in the tire rotation.
5-84

Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. SeeEngine
Coolant on page 5-24for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer tank 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. SeeTires on page 5-53for further
details. Check to make sure the spare tire is stored
securely. SeeChanging a Flat Tire on page 5-73.
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 5-64.
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 2-27.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
6-9