Hummer H3. Manual — part 1432

HEADLAMP BULB REPLACEMENT

3. Disconnect the electrical connector from the forward lamp harness

connector.

4. Disconnect the jumper harness connector from the fender flare turn

signal lamp.

Tighten: 10 N.m (89 lb in)

2

Headlamp Support Bracket Bolt

Procedure

1. Rotate the bracket upward to allow access to remove headlamp

assembly.

2. Rotate the outer edge of the headlamp outward in order to remove the

lamp assembly from the grille assembly support.

Tighten: 5 N.m (44 lb in)

3

Headlamp Assembly

Procedure

1. Remove the bulbs from the headlamp assembly and transfer.

2. Pull the headlamp assembly forward to remove.

3. Aim the headlamp assembly after service. Refer to Headlamp

Aiming.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

Fig. 101: Headlamp Bulb Replacement
Courtesy of GENERAL MOTORS CORP.

Headlamp Bulb Replacement

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.

Callout

Component Name

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.

Preliminary Procedure

1. Open the hood and secure the prop rod.

2. Disconnect the electrical connector to the headlamp bulb socket.

3. Turn the bulb socket counterclockwise to remove.

1

Daytime Running Lamp Bulb/Park Turn Signal Socket

2

Daytime Running Bulb/Park Turn Signal Bulb

3

Headlamp Bulb (Lo/Hi) (H13)
Tip: Pinch terminal and pull to remove bulb.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

If oncoming vehicles flash their high beams at you, this may also mean the vertical aim needs to
be adjusted.

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 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 on it.

The vehicle should be fully assembled and all other work stopped while headlamp aiming is
being performed.

The vehicle should be normally loaded with a full tank of fuel and one person or 160 lbs (75
kg) sitting on the driver's seat.

Tires should be properly inflated.

The spare tire is in its original location in the vehicle.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

Fig. 102: Identifying Headlamp Aiming Dot
Courtesy of GENERAL MOTORS CORP.

1. To adjust the vertical aim, perform the following procedure:

1. Find the aim dot on the lens of the headlamp.

2. Measure the distance from the ground to the aim dot on the headlamp. Record the

distance.

3. At the wall or other flat surface, measure from the ground upward the recorded

distance from Step 2 and mark it.

4. Draw or tape a horizontal line the width of the vehicle at the wall or other flat surface

where it was marked it Step 4.

2. Turn on the 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 flat surface.

NOTE:

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.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3