BUICK LACROSSE 2007 Owner's Manual

To disconnect the jumper cables from both
vehicles, do the following:
1. Disconnect the black negative (−) cable from
the vehicle that had the dead battery.
2. Disconnect the black negative (−) cable from
the vehicle with the good battery.
3. Disconnect the red positive (+) cable from the
vehicle with the good battery.
4. Disconnect the red positive (+) cable from the
other vehicle.
5. Return the fuse block cover to its original
position.
Headlamp Aiming
The vehicle has a visual optical headlamp aiming
system. The aim has been preset at the factory
and should need no further adjustment
However, If the vehicle is damaged in an accident,
the headlamp aim may be affected and adjustment
may be necessary.
If oncoming vehicles ash their high beams at
you, this may also mean the vertical aim needs to
be adjusted.It is recommended that the vehicle is taken to your
dealer for service if the headlamps need to be
re-aimed. It is possible however, to re-aim
the headlamps as described in the following
procedure.
The vehicle should be properly prepared as follows:
The vehicle should be placed so the headlamps
are 25 ft. (7.6 m) from a light colored wall.
The vehicle must have all four tires on a
perfectly level surface which is level all the way
to the wall.
The vehicle should be placed so it is
perpendicular to the wall.
The vehicle should not have any snow, ice or
mud on it.
The vehicle should be fully assembled and all
other work stopped while headlamp aiming is
being done.
The vehicle should be normally loaded with a
full tank of fuel and one person or 160 lbs
(75 kg) on the driver’s seat.
Tires should be properly inated.
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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.
The vertical headlamp aiming screws are located
under the hood near the headlamps.
The adjustment screw can be turned with a
6 mm male hex.To adjust the vertical aim on the headlamps,
do the following:
1. Open the hood. SeeHood Release on
page 349for more information.
2. Locate 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.
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4. At the wall measure from the ground
upward (A) to the recorded distance
from Step 3 and mark it.
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.
5. Draw or tape a horizontal line (B) on the wall
the width of the vehicle at the height of the
mark in Step 4.6. 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 at surface.
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 male hex.
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.
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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.
Bulb Replacement
For the proper type of replacement bulbs, see
Replacement Bulbs on page 400.
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.
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Headlamps and Sidemarker Lamps
A. Sidemarker Lamp
B. Low-Beam Headlamp
C. High-Beam Headlamp
Low-Beam Headlamp and
Sidemarker Bulbs
To replace a low-beam headlamp or sidemarker
bulb, do the following:
1. Open the hood. SeeHood Release on
page 349for more information.
2. Remove the fastener from the front fascia.
The fastener is located inboard of the
headlamp assembly, near the high-beam
headlamp.
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3. Pull up on the plastic retaining clip (C) while
pushing rearward on the headlamp. Align the
square cut-out on the retaining clip with
the notch on the headlamp.
4. Remove the screw (A) from the metal
headlamp retainer to pull up and release the
headlamp assembly.
5. Remove the push pin (B) retaining the front
fascia.6. Pull forward on the front fascia and then pull
the headlamp assembly out from the vehicle.
Moving the headlamp up and down slightly
may help with its removal.
You may have someone assist you with
this step.
7. Remove the access cover from behind the
bulb being replaced.
8. Turn the bulb socket one-quarter of a turn to
remove it from the headlamp assembly.
9. Holding the base of the socket, pull the old
bulb from the socket.
10. Replace with a new bulb.
11. Reverse all the steps to reassemble the
headlamp assembly.
When replacing the plastic retaining clip,
push down on it while pushing rearward on
the headlamp, making sure the headlamp
assembly is secure.
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High-Beam Headlamp Bulbs
To replace the high-beam headlamp bulb, do the
following:
1. Open the hood. SeeHood Release on
page 349for more information.
2. Locate the high-beam headlamp bulb socket.
3. Remove the access cover from behind the
bulb being replaced.
4. Turn the bulb socket counterclockwise and
pull it from the headlamp assembly.
5. Holding the base of the socket, pull the old
bulb from the socket.
6. Replace with a new bulb.
7. Reverse Steps 2 through 4 to reinstall.
Front Turn Signal and Parking
Lamps
To replace a front turn signal/parking lamp bulb in
the front fascia, do the following:
1. Locate the front turn signal/parking bulb
socket by reaching behind the front bumper.
2. Turn the bulb socket counterclockwise and
pull it out of the assembly.
3. Holding the base of the socket, pull the old
bulb from the socket.
4. Push the new bulb into the socket.
5. Reverse Steps 1 through 3 to reinstall.
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Taillamps, Turn Signal, Sidemarker,
Stoplamps and Back-up Lamps
To replace a taillamp, turn signal, sidemarker,
stoplamp or back-up lamp bulb, do the following:
1. Open the trunk. SeeTrunk on page 100
for more information.
2. Remove the convenience net if the vehicle
has one.
3. Remove the four plastic wing nuts retaining
the trunk trim. There are two wing nuts
located on the driver’s side (shown) and
two located on the passenger’s side of the
vehicle.
4. Pull back the trunk trim.
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5. Remove the two wing nuts holding the
taillamp assembly in place.
6. Pull out the taillamp assembly and disconnect
the wiring harness.A. Taillamp
B. Back-up
C. TaillampD. Stoplamp/Taillamp/
Turn Signal
E. Sidemarker
7. Turn the bulb socket counterclockwise to
remove it.
8. Replace with a new bulb.
9. Turn the bulb socket clockwise to reinstall.
10. Reverse these steps to reinstall the
taillamp assembly.
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License Plate Lamp
To replace one of these bulbs, do the following:
1. Remove the two screws holding each of
the license plate lamps to the fascia.
2. Turn and pull the license plate lamp forward
through the fascia opening.
3. Turn the bulb socket counterclockwise and
pull the bulb straight out of the socket.
4. Install the new bulb.
5. Reverse Steps 1 through 3 to reinstall the
license plate lamp.
Replacement Bulbs
Exterior Lamps Bulb Number
Back-Up Lamps 921
Fog Lamp H11
Front Turn Signal and
Parking Lamps3157NAK
Headlamps
High-Beam H9
Low-Beam H11
Front/Rear Sidemarker,
License Plate Lamp,
and Taillamp194
Stoplamps and Taillamps 3057
For replacement bulbs not listed here, contact
your dealer.
400