Headlamp assembly on Pontiac G6

some times headlamp units have a plastic retaining clip on the underside of headlamp, does the headlight move from side to side? try to pull the headlight back from the top of unit then lift up the headlamp unit, if not it could be the headlamp adjusters holding unit in place.

It's very hard to take the Headlamp assembly out and try to seal it correctly with either glue or RTV. Many folks drill two holes ( about 1/8" in the bottom of the lense assembly and let the water out as fast as it comes in. Put one hold close to the Fender and the other one closer to the center of the car, this way when you park on an uneven surface the water will run to one side or the other and drain.

To change the bulbs you need to first remove the 5 plastic pop screws on the front bumper. They're spread out at the top of the bumper right under the hood. Once you get those out, you have to remove the two hex bolts on each headlight. Then it gets tricky. You need to pull the light towards the front of the car until it pops out of the ball-bearing type mount on the fender. Once that pops out, you have to pull the front bumper forward while maneuvering the headlight out towards the front.

As per the manual it says as follows:---

Open the hood.

Hold the headlamp to prevent damage to the headlamp or to the fascia. Remove the bolts from the headlamp assembly. Remove the push-in-retainers across the front fascia. Remove the headlamp assembly. Lift the headlamp upward to release the locating tab from the front edge of the fender.

Disconnect the electrical connector from the headlamp assembly.

Remove the headlamp bulb access cover by rotating the headlamp bulb access cover counterclockwise, if necessary.

Remove the headlamp bulb from the housing by rotating the socket counterclockwise, if necessary.

Disconnect the headlamp bulb electrical connector, if necessary.

Remove the park/turn bulb access cover by rotating the cover counterclockwise, if necessary.

Remove the park/turn bulb from the housing by rotating the socket counterclockwise, if necessary.

Gently pull the park/turn bulb from the socket, if necessary. Install the park/turn bulb into the bulb socket.

Install the park/turn bulb socket into the headlamp housing by rotating the socket clockwise.

Install the park/turn bulb access cover by rotating the cover clockwise.

Connect the headlamp bulb to the headlamp electrical connector.

Install the headlamp bulb into the headlamp housing. Rotate the socket clockwise until locked.

Install the headlamp bulb access cover by rotating the cover clockwise.

Position the headlamp assembly to the vehicle. Lift the headlamp upward to release the locating tab to the front edge of the fender.

Install the bolts to the headlamp assembly. Tighten the bolts to 2 N·m (18 lb in).

Install the push-in-retainers across the front fascia.

Close the hood.

----------This will help.thanks.Helpmech.

Those are sealed unit headlamps, you need to replace the entire headlamp, not the bulb.

There are 4 screws on the trim ring, don't confuse the aiming adjusters. Remove the 2 bottom screws, then one of the top screws. While holding the headlamp in place, remove the last screw. Hold the headlamp out far enough to be able to unplug it carefully. Then just reverse this to put the new one in. There is a top and bottom on the headlamp, (make sure you can read the name on the headlamp lens) and on the trim ring (make sure the holes line up.

It would also help to buy some silicone bulb grease for the connector, this'll keep it from corroding. Just smear some grease on the prongs before you connect the new headlamp.

REMOVAL AND INSTALLATION Headlamp Assembly Removal

1. Remove radiator air deflector from radiator support.
   

1. Remove two screws and two nuts retaining headlamp door (13064).
   

1. Pull headlamp door from vehicle. Remove three bulbs and sockets.
   

1. Disconnect engine control sensor wiring (12A581) from headlamp bulb (13007).
   

1. Remove two retainers attaching upper two attachments of headlamp (13008).
   

1. Turn horizontal headlamp adjusting screw (13032) completely out of the adjusting nut.
   

1. Pull headlamp from vehicle.
   

Installation

1. Follow removal procedures in reverse order.
   

1. Tighten screws to 1.4-2.3 Nm (13-20 lb-in). Tighten nuts to 4-7 Nm (36-61 lb-in).
   

1. Raise the hood.
2. Lift upward on the headlamp retainer (1).
3. Pull the headlamp assembly outward enough to release the headlamp assembly from the upper fascia support.
4. Position the headlamp assembly away from the vehicle body to access the electrical connector
   1. Disconnect the electrical connector from the headlamp assembly.
   2. Remove the headlamp assembly from the vehicle.
   3. Use caution handling halogen bulbs. Remove the headlamp bulb/socket from the headlamp, by turning counterclockwise. CAUTION: Refer to Halogen Bulb Caution in Service Precautions.
   4. Remove the headlamp bulb/socket from the headlamp assembly.

Remove the bolts from the headlamp assembly.

Remove the push-in-retainers across the front fascia.

Pull the headlamp forward to release the locating tab from the front of the fender, then lift the headlamp up to release from vehicle

then disconnect the electrical connectors

hope this helps

Remove the bolts from the headlamp assembly.

Remove the push-in-retainers across the front fascia.

Pull the headlamp forward to release the locating tab from the front of the fender, then lift the headlamp up to release from vehicle

replace the bulb and reassemble

　
　
Lighting
Headlight Assembly
Removal & Installation
To Remove:
Open the hood.
Apply light pressure to the headlamp lens to hold the headlamp in place while disconnecting the retainers.
Lift up the retainers to release and remove the retainers.
Remove the headlamp mounting tabs from the slots in the upper fascia support and fender reinforcement.
Disconnect the wiring harness from the headlamp assembly.
Remove headlamp.
Remove the rubber access cover from the appropriate bulb to be replaced.
Rotate the headlamp bulb/socket counterclockwise to remove from the headlamp assembly.
To Install:
Connect the wiring harness to the headlamp.
Install the headlamp bulb/socket to the headlamp assembly rotating the socket clockwise until fully seated.
Install the rubber access cover.
Position the headlamp mounting tabs to the slots in the upper fascia and fender reinforcement.
Apply light pressure to the headlamp lens to hold the headlamp in place while installing the retainers.
Align the headlamp assembly retainers and slide them over the headlamp mounting tabs.
Close the hood.

　
Top of Form 1
Bottom of Form 1

you doo not need to remove the bumper...the rt side is a bit tighter than the left side though..on the back of the headlamp are plastic screw retainers..they turn 1/4 to 1/2 turn to unlock the headlamp bulbs.( you could remove the battery to do this..it will certainly give you more room.) once you turn the lock grab the bulb and pull it straight back , unplug it and plug the new one in. be careful not to touch the new bulb glass with your fingers as this can get oil on the surface and create a "hot spot" which can lead to premature failure!