GM Century/Lumina/Grand Prix/Intrigue 1997-2000 Repair Guide
Headlamps REMOVAL & INSTALLATION
Do not apply pressure to the plastic bubble of the vertical aim indicator.
Open the hood.
Disconnect the negative battery cable.
Remove the headlamp bezel retainers and bezel.
Remove the spring from the bottom edge of the headlamp assembly.
Detach the electrical connector from the assembly.
Unfasten the two screws from the headlamp retaining ring.
Rotate the retaining ring away from the headlamp.
Remove the headlamp from the vehicle.
Position the headlamp and retaining ring and secure with the two retaining screws. Tighten the screws to 18 inch lbs. (2 Nm).
Attach the electrical connector to the assembly.
Install the spring to the bottom of the headlamp assembly.
Install the headlamp bezel and retainers.
Connect the negative battery and test the lights for proper operation.
The headlamps used on the
majority of vehicles covered by this guide are called "composite
lamps". Unlike the glass sealed beam units used on older vehicles,
these headlamps are made of special plastic using small halogen gas
bulbs. The bulbs are replaceable, but they do require special handling.
Halogen bulbs contain a gas under pressure. Handling a bulb
improperly could cause it to shatter into flying glass fragments.
Always allow the bulb to cool before removal. Always use the following
precautions to help avoid personal injury.
Turn the light switch OFF and allow the bulb to cool before
changing bulbs. Leave the switch OFF until the bulb replacement
procedure is complete.
Always wear eye protection when changing a halogen bulb.
Handle the bulb only by its base. Avoid touching the glass. Do not drop or scratch the bulb.
Keep the bulb away from moisture.
Place the used bulb in the new bulb's carton and dispose of it properly. Keep halogen bulbs out of reach of children.
Depending on the installation, the low-bean and the
high-beam halogen bulbs may actually be removable without removing the
entire composite headlamp assembly. Look your application over
carefully to see there is enough room behind the headlamp to fit your
hand to remove the bulb holder. Since removing the composite headlamp
assembly is not difficult, the following procedure assumes that the
headlamp is being removed from the vehicle for halogen bulb service.
Raise the hood and look at the headlamp installation. On
some applications, the headlamp is retained by screws and some molded
tabs that slip into slots in the sheetmetal mounting bracket. On other
applications, two U-shaped clips may hold the headlamp in place. Remove
the headlamp retainers and gently work the headlamp free of the vehicle.
If the wiring harness is so short that it is difficult to work on
the headlamp, simply unplug the electrical connector from the headlamp
The halogen bulb may have a large, knurled plastic ring that
retains the socket to the headlamp. Turn this ring to detach it and
remove the socket with the halogen bulb.
- Remove the burned-out bulb and discard safely.
Do not touch the glass bulb with your fingers. Oil from
your fingers can severely shorted the life of the bulb. If necessary,
wipe off any dirt or oil from the bulb with rubbing alcohol before
Take great care not to touch the new replacement halogen bulb as
oil from your skin will burn when the bulb is turned on and may damage
the glass, shortening the life of the bulb. Use a clean, dry paper
towel to handle the bulb.
Installation is the reverse of the removal procedure.
Verify that the lights work correctly.
Headlamp adjustment may be temporarily made using a wall,
as described below, or on the rear of another vehicle. When adjusted,
the lights should not glare in oncoming car or truck windshields, nor
should they illuminate the passenger compartment of vehicles driving in
front of you. These adjustments are rough and should always be
fine-tuned by a repair shop which is equipped with headlamp aiming
tools. Improper adjustments may be both dangerous and illegal.
Fig. Typical composite headlamp aiming rods
Fig. Typical horizontal and vertical adjuster locations
Fig. Vehicle headlamp aiming device (RH)-Buick shown, others similar
Before removing the headlamp bulb or disturbing the headlamp
in any way, note the current settings in order to ease headlamp
adjustment upon reassembly. If the high or low beam setting of the old
lamp still works, this can be done using the wall of a garage or a
Park the vehicle on a level surface, with the fuel tank about
full and with the vehicle empty of all extra cargo (unless normally
carried). The vehicle should be facing a wall which is no less than 6
feet (1.8m) high and 12 feet (3.7m) wide. The front of the vehicle
should be about 25 feet from the wall.
If neither beam on one side is working, and if another like-sized
vehicle is available, park the second one in the exact spot where the
vehicle was and mark the beams using the same-side light. Then switch
the vehicles so the one to be aimed is back in the original spot. It
must be parked no closer to or farther away from the wall than the
Perform any necessary repairs, but make sure the vehicle is not
moved, or is returned to the exact spot from which the lights were
marked. Turn the headlamps ON and adjust the beams to match the marks
on the wall.
Have the headlamp adjustment checked as soon as possible by a reputable repair shop.
Hope helps with this (remember rated this) Good luck.