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Headlamp aiming is done with the vehicle's low-beam
headlamps. The high-beam headlamps will be correctly
aimed if the low-beam headlamps are aimed properly.
To adjust the vertical aim:1. Open the hood. See Hood Release
on page 6‑15for more information.
2. Find the aim dot on the lens of the low‐beam
headlamp.
3. Measure the distance from the ground to the aim dot on the low‐beam headlamp. Record the
distance.
4. At the wall measure from the ground upward (A) tothe recorded distance from Step 3 and mark it.
5. Draw or tape a horizontal line (B) on the wall the width of the vehicle at the height of the mark in
Step 4.
Notice: Do not cover a headlamp to improve beam
cut-off when aiming. Covering a headlamp may
cause excessive heat build-up which may cause
damage to the headlamp.
6. Turn on the low-beam headlamps and place a piece of cardboard or equivalent in front of the
headlamp not being adjusted. Do not place directly
on the headlamp. This allows only the beam of
light from the headlamp being adjusted to be seen
on the flat surface.
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Driver Side Shown
7. Locate the vertical headlamp aiming screws, which are under the hood near each headlamp assembly.
The adjustment screw can be turned with a 6 mm
hex socket.
8. Turn the vertical aiming screw until the headlamp beam is aimed to the horizontal tape line. Turn it
clockwise or counterclockwise to raise or lower the
angle of the beam.
The top edge of the cut-off should be positioned at
the bottom edge of the horizontal tape line.
9. Make sure that the light from the headlamp is positioned at the bottom edge of the horizontal
tape line. The lamp on the left (A) shows the
correct headlamp aim. The lamp on the right (B)
shows the incorrect headlamp aim.
10. Repeat Steps 7 through 9 for the opposite headlamp.
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Bulb Replacement
For the proper type of replacement bulbs, see
Replacement Bulbs on page 6‑53.
For any bulb changing procedure not listed in this
section, contact your dealer/retailer.
Halogen Bulbs
{WARNING:
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, Front Turn Signal, and
Parking Lamps
A. Headlamp
B. Turn Signal/Parking Lamp
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To replace the headlamp, turn signal, or parking
lamp bulb:1. Turn the wheel to access the wheel well.
2. Remove the fasteners located on the wheel liner. To access the headlamp and the turn
signal/parking lamp bulbs. 3. Reach in behind the wheel well liner and locate the
bulb to be changed.
4. Turn the bulb socket counterclockwise and pull it straight out of the lamp assembly.
5. Pull the old bulb straight out of the bulb socket.
6. Push the new bulb straight into the bulb socket until it clicks.
7. Push the bulb socket straight into the lamp assembly and turn it clockwise to lock it into place.
8. Reinstall the wheel well liner using fasteners.
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5. Push and turn the license plate back through thefascia opening.
6. Reinstall the two screws holding the license plate lamps to the fascia.
Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp and CHMSL 921
Front Turn Signal and Parking
Lamp (Amber) 5702KA
Front Turn Signal and Parking
Lamp (Clear) B2N
Headlamp High/Low-Beam H13
Stoplamp/Taillamp/Turn Signal 3057KX
For replacement bulbs not listed here, contact your
dealer/retailer.
Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for wear
or cracking. SeeScheduled Maintenanceon page 7‑3for more information on wiper blade inspection. Replacement blades come in different types and are
removed in different ways. For the proper type and
length, see
Maintenance Replacement Parts
on
page 7‑12. Here's how to remove the wiper blade:
1. Pull the windshield wiper arm away from the windshield.
2. While holding the wiper arm, lift the clip up fromthe blade connecting point, and pull the blade
assembly down toward the windshield to remove it
from the wiper arm.
3. Install the new wiper blade on the wiper arm and press down on the clip to snap it into place.
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Wheel Alignment and Tire Balance
The tires and wheels on your vehicle were aligned and
balanced carefully at the factory to give you the longest
tire life and best overall performance. Adjustments
to wheel alignment and tire balancing will not be
necessary on a regular basis. However, if you notice
unusual tire wear or your vehicle pulling to one side or
the other, the alignment might need to be checked.
If you notice your vehicle vibrating when driving on a
smooth road, the tires and wheels might need to be
rebalanced. See your dealer/retailer for proper
diagnosis.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly
rusted or corroded. If wheel nuts keep coming loose,
the wheel, wheel bolts, and wheel nuts should be
replaced. If the wheel leaks air, replace it (except some
aluminum wheels, which can sometimes be repaired).
See your dealer/retailer if any of these conditions exist.
Your dealer/retailer will know the kind of wheel
you need.
Each new wheel should have the same load-carrying
capacity, diameter, width, offset, and be mounted the
same way as the one it replaces.If you need to replace any of your wheels, wheel bolts,
wheel nuts, or Tire Pressure Monitor System (TPMS)
sensors, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts, wheel nuts, and TPMS sensors
for your vehicle.
{WARNING:
Using the wrong replacement wheels, wheel bolts,
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use the
correct wheel, wheel bolts, and wheel nuts for
replacement.
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.
See Changing a Flat Tire
on page 6‑88for more
information.
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The vehicle has an airbag system. Before attempting to
add anything electrical to the vehicle, seeServicing
Your Airbag-Equipped Vehicle
on page 2‑76and
Adding Equipment to Your Airbag-Equipped Vehicleon
page 2‑77.
Headlamp Wiring
The headlamp wiring is protected by fuses in the fuse
block. An electrical overload will cause the lamps to turn
off. If this happens, have the headlamp wiring checked
right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker and a fuse. If the motor overheats due to heavy
snow, etc., the wiper will stop until the motor cools.
If the overload is caused by some electrical problem,
have it fixed.
Power Windows and Other Power
Options
Fuses in the fuse block protect the power windows.
When the current load is too heavy, the fuse opens
protecting the circuit until the problem is fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from
short circuits by a combination of fuses, circuit breakers
and fusible thermal links. This greatly reduces the
chance of damage caused by electrical problems.
Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one of the identical size
and rating.
If you ever have a problem on the road and do not have
a spare fuse, you can “borrow”one that has the
same amperage. Just pick some feature of the vehicle
that you can get along without —like the radio or
cigarette lighter —and use its fuse if it is the
correct amperage. Replace it as soon as you can.
There are two fuse blocks in the vehicle: the floor
console fuse block and the engine compartment fuse
block.
There are also one or two fuses located at the back of
the vehicle near the battery.
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RelaysUsage
14 Rear Defogger Relay
15 Air Conditioning Clutch
16 Empty
17 Rear Wiper
18 Liftgate Release
19 Fuel Pump
24 Empty
26 Powertrain
28 Daytime Running Lamps
34 Starting System
35 Empty
38 Empty
39 Windshield Washer Pump
48 Rear Windshield Washer
50 Cooling Fan
51 Run, Crank
RelaysUsage
52 Windshield Wiper
54 Fog Lamps (Option)
55 Horn
68 Parking Lamps
70 Windshield Wipers
71 Headlamp Low-Beam
72 Headlamp High-Beam
A Center High-Mounted Stoplamp Relay, and a Rear
Access Panel Door Interlock Relay (Panel Van only),
are located underhood in front of the left shock tower.
The Left Rear Access Panel Door Relay (Panel Van
Only), and the Right Rear Access Panel Door Relay
(Panel Van Only) are located in the rear of the vehicle
behind the right rear quarter trim panel.
A Rear Power Plug mini fuse (Panel Van Only) is
located near the battery in the rear of the vehicle.
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