2004 PONTIAC GRAND PRIX Owners Manual

Headlamp aiming is done with the vehicle's low-beam
lamps. The high-beam lamps will be correctly aimed
if the low-beam lamps are aimed properly.
The vertical headlamp aiming screws are under the
hood near the headlamps.
Adjustment screws can be turned with an E8 Torx
ž
socket or T15 Torxžscrewdriver.
Headlamp Vertical Aiming
1. Find the aim dot on the lens of the low beam lamp.
2. Measure the distance from the ground to the aim
dot on the lamp. Record the distance.
5-57

3. At the wall or other ¯at surface, measure from the
ground upward the recorded distance from Step 2
and draw or tape 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 only
the beam of light from the headlamp being
aimed to be seen on the ¯at surface.
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.
5-58

5. Turn the vertical aiming screw until the headlamp
beam is aimed to the horizontal tape line. The top
edge of the cut-off should be positioned at the
bottom edge of the horizontal tape line.
6. Repeat steps 4 and 5 for the opposite headlamp.
Bulb Replacement
For the proper type of replacement bulb, seeReplacement Bulbs on page 5-66.
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.
5-59

Headlamps and Sidemarker Lamps
1. Open the hood and replace the bulb for the
appropriate lamp listed below.
A. High-Beam Headlamp
B. Low-Beam Headlamp
C. Sidemarker Lamp2. Pull up half-way on the plastic retaining clip on the
electrical connector.
5-60

3. Pull the headlamp assembly straight out from the
vehicle. Be careful to avoid scratching or chipping
the paint on the vehicle while removing.4. Turn the bulb socket ring one-quarter of a turn
counterclockwise to remove it from the headlamp
assembly. Pull the old bulb from the socket.
5. Place the new bulb into the socket.
6. Turn the bulb socket ring one-quarter turn clockwise
to reinstall it back into the headlamp assembly.
7. Carefully reinstall the headlamp assembly. Be
careful to avoid scratching or chipping the paint
on the vehicle while reinstalling the assembly.
8. Push down on the plastic retaining clip on the
electrical connector, making sure the headlamp
assembly is secure.
5-61

Front Turn Signal, Parking and
Fog Lamps
The front turn signal, parking and fog lamps are located
below the high, low-beam and sidemarker lamps
1. Open the hood. Replace the bulb for the appropriate
lamp listed below.
A. Front Turn Signal,
Parking Lamp
B. Fog Lamp
2. Remove the headlamps.3. Pull up half-way on the plastic retaining clip on the
electrical connector.
5-62

4. Pull the headlamp assembly straight out from the
vehicle.The front turn signal,
parking lamp and
fog lamp bulbs are
located below the
headlamp assembly.
The arrow shows the
turn signal/parking lamp
bulb. The fog lamp bulb
is below it.
5. Turn the bulb socket one-quarter of a turn
counterclockwise to remove it from its assembly.
6. Pull the old bulb from the socket and replace it
with a new one.
7. Turn the bulb socket a quarter turn clockwise to
reinstall it.
8. Carefully reinstall the headlamp assembly.
Be careful to avoid scratching or chipping the
paint on the vehicle.
9. Push down on the plastic retaining clip on the
electrical connector, making sure the headlamp
assembly is secure.
5-63

Center High-Mounted Stoplamp
(CHMSL)
The LED bulb for the center high-mounted stoplamp is
located in the spoiler. See your dealer for replacement.
Taillamps, Turn Signal, and
Stoplamps
1. Open the trunk. Replace the bulb for the appropriate
lamp listed below.
A. Taillamp
B. Taillamps, Turn Signal
and Stop Lamps2. Remove the convenience net, if equipped, by
removing the net hook attachments.
3. Pull the trunk trim and carpet away from the back of
the trunk.
4. Remove the bottom bolt and nut wings.
5. Carefully remove the
taillamp assembly by
pulling it out from
the vehicle. Be careful
to avoid scratching
or chipping the paint
on the vehicle.
5-64