2001 PONTIAC BONNEVILLE Owners Manual

6-36
If your vehicle is damaged in an accident, the headlamp
aim may be affected. Aim adjustment to the low beam
may be necessary if it is difficult to see lane markers
(for horizontal aim), or if oncoming drivers flash their
high beams at you (for vertical aim). If you believe your
headlamps need to be re
-aimed, we recommend that you
take your vehicle to your dealer for service. However, it
is possible for you to re
-aim your headlamps as
described in the following procedure.
NOTICE:
To make sure your headlamps are aimed
properly, read all the instructions before
beginning. Failure to follow these instructions
could cause damage to headlamp parts.
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 or other
flat surface.

The vehicle must have all four tires on a perfectly
level surface which is level all the way to the wall or
other flat surface.

The vehicle should be placed so it is perpendicular to
the wall or other flat surface.

The vehicle should not have any snow, ice or mud
attached to 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 inflated.
Headlamp aiming is done with the vehicle low beam
lamps. The high beam lamps will be correctly aimed if
the low beam lamps are aimed properly.

6-37
The headlamp aiming devices are under the hood near
the headlamps.
If you believe your headlamps need horizontal
(left/right) adjustment, follow the horizontal aiming
procedure. If you believe your headlamps need only
vertical (up/down) adjustment, follow only the vertical
aiming procedure.
Adjustment screws can be turned with an E8 Torx


socket or T15 Torx screwdriver.Headlamp Horizontal Aiming
Turn the horizontal aiming screw (A) until the
indicator (B) is lined up with zero.
Once the horizontal aim is adjusted, then adjust the
vertical aim.

6-38
Headlamp Vertical Aiming
1. Find the aim dot on the lens of the lamps.
2. Measure the distance from the ground to the aim dot
on each lamp; if left low beam, subtract two inches.
Record this distance.3. At the wall or other flat surface, measure from the
floor to the recorded distance and draw a horizontal
line the width of the vehicle.
4. Turn on the low beam headlamps and place a piece
of cardboard or equivalent in front of the headlamp
not being aimed. This should allow the beam cut
-off
of the headlamp being aimed to be seen on the
flat surface.

6-39
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. Turn the vertical aiming screw (C) until the
headlamp beam is aimed to the horizontal tape line.

6-40 Front Turn Signals and Parking Lamps
1. Remove the two bolts with a 10 mm socket.
2. Use a large screwdriver by the outside mount to
separate the lamp assembly from the outboard snap
mounting pin. Slide the headlamp assembly outward
and lift it out.
3. Disconnect the wiring harness from the
headlamp assembly.

6-41
4. Tip the headlamp assembly and while pressing the
release, turn the bulb and socket counterclockwise to
remove them.
5. Replace the bulb and reinstall the socket. Then
reconnect the wiring harness to the lamp assembly.6. Slide the lamp assembly back into place by lining up
the track on the bottom of the assembly with the
guide on the vehicle. Then connect the outboard snap
and secure the lamp assembly with the two bolts.

6-42 Rear Turn Signals, Stoplamps, Taillamps
and Back-Up Lamps
For the proper bulb type, see ªReplacement Bulbsº in
the Index.
A. Back-Up Lamp
B. Turn SignalC. Taillamp
D. Tail/Brake Lamp
1. Open the trunk. Turn the screws located inside of the
trunk counterclockwise and remove them.
2. Remove the plastic trim piece from the trunk.3. Pull the carpeting away from the rear corner of
the trunk.
4. Remove the three 10 mm nuts holding the lamp in
place and remove the lamp assembly.
5. While pressing the release, turn the bulb socket
assembly counterclockwise to remove it from the
lamp assembly.
6. Pull the bulb straight out to remove it from the socket.
7. Replace the bulb and reverse Steps 1 through 6 to
reinstall the lamp assembly.

6-43
Windshield Wiper Blade Replacement
Windshield wiper blades should be inspected at least
twice a year for wear or cracking. See ªWiper Blade
Checkº in the Index for more information.
To replace the wiper blade assembly:
1. Lift the wiper up from the windshield and set into
the vertically
-locked position.
2. Press the tab that holds the wiper blade to the arm.
3. Slide the blade down and off the arm.
4. Slide in the new blade and snap into place.
For the proper windshield wiper blade replacement
length and type, see ªNormal Maintenance Replacement
Partsº in the Index.