2007 GMC YUKON XL low beam

What to Use
Refer to the Maintenance Schedule to determine
what kind of lubricant to use. SeeRecommended
Fluids and Lubricants on page 564.
Headlamp Aiming
The vehicle has a visual optical headlamp aiming
system. The aim of the headlamps have been
preset at the factory and should need no further
adjustment.
However, if the vehicle is damaged in an accident,
the aim of the headlamps may be affected and
adjustment may be necessary.
If oncoming vehicles ash their high beams at
you, this may mean the vertical aim of your
headlamps needs to be adjusted.
It is recommended that the vehicle is taken to your
dealer for service if the headlamps need to be
adjusted. It is possible however, to re-aim
the headlamps as described in the following
procedure.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.
The vehicle must have all four tires on a level
surface which is level all the way to the wall.
The vehicle should be placed so it is
perpendicular to the wall.
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 inated.
The spare tire is in its proper location in the
vehicle.
Headlamp aiming is done with the vehicle’s
low-beam headlamps. The high-beam headlamps
will be correctly aimed if the low-beam headlamps
are aimed properly.
475

To adjust the vertical aim, do the following:
1. Open the hood. SeeHood Release on
page 435for more information.
2. Locate the aim dot on the lens of the
low-beam headlamp.
3. Measure the distance from the ground to the
aim dot on the low-beam headlamp. Record
the distance.4. At the wall or other at surface, measure from
the ground upward (A) to the recorded
distance from Step 3 and mark it.
5. Draw or tape a horizontal line (B) on the wall
or at surface the width of the vehicle at the
height of the mark in Step 4.
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.
6. Turn on the low-beam headlamps and place a
piece of cardboard or equivalent in front of the
headlamp not being adjusted. This allows
only the beam of light from the headlamp
being adjusted to be seen on the at surface.
476

7. Locate the vertical headlamp aiming screws,
which are under the hood near each headlamp
assembly.
The adjustment screw can be turned with a
E8 Torx
®socket.
8. Turn the vertical aiming screw until the
headlamp beam is aimed to the horizontal
tape line. Turn it clockwise or
counterclockwise to raise or lower the angle
of the beam.9. Make sure that the light from the headlamp is
positioned at the bottom edge of the horizontal
tape line. The lamp on the left (A) shows
the correct headlamp aim. The lamp on the
right (B) shows the incorrect headlamp aim.
10. Repeat Steps 7 through 9 for the opposite
headlamp.
477

Fuses Usage
1 Not Used
2Electronic Stability Suspension
Control, Automatic Level Control
Exhaust
3 Left Trailer Stop/Turn Lamp
4 Engine Controls
5Engine Control Module, Throttle
Control
6 Right Trailer Stop/Turn Lamp
7 Front Washer
8 Oxygen Sensors
9 Anti-lock Brakes System 2
10 Trailer Back-up Lamps
11 Driver’s Side Low-Beam Headlamp
12 Engine Control Module (Battery)
13Fuel Injectors, Ignition Coils
(Right Side)
14Transmission Control Module
(Battery)
15 Vehicle Back-up Lamps
16Passenger’s Side Low-Beam
Headlamp
17 Air Conditioning Compressor
18 Oxygen Sensors
19 Transmission Controls (Ignition)Fuses Usage
20 Fuel Pump
21 Not Used
22 Rear Washer
23Fuel Injectors, Ignition Coils
(Left Side)
24 Trailer Park Lamps
25 Driver’s Side Park Lamps
26 Passenger’s Side Park Lamps
27 Fog Lamps
28 Horn
29Passenger’s Side High-Beam
Headlamp
30 Daytime Running Lamps
31 Driver’s Side High-Beam Headlamp
32 Daylight Running Lamps 2
33 Sunroof
34Key Ignition System, Theft Deterrent
System
35 Windshield Wiper
36 SEO B2 Uptter Usage (Battery)
37 Electric Adjustable Pedals
38 Climate Controls (Battery)
39 Airbag System (Ignition)
40 Amplier
545

Relays Usage
FAN HI Cooling Fan High Speed
FAN LO Cooling Fan Low Speed
ENG EXH VLV Not Used
FAN CNTRL Cooling Fan Control
HDLP LO/HID Low-Beam Headlamp
FOG LAMP Front Fog Lamps
A/C CMPRSR Air Conditioning Compressor
STRTR StarterRelays Usage
PWR/TRN Powertrain
FUEL PMP Fuel Pump
PRK LAMP Parking Lamps
REAR DEFOG Rear Defogger
RUN/CRANK Switched Power
547

H
Hazard Warning Flashers............................. 188
Head Restraints............................................. 18
Headlamp
Aiming...................................................... 475
Headlamps
Automatic Headlamp System.................... 201
Bulb Replacement..................................... 478
Daytime Running Lamps........................... 201
Flash-to-Pass............................................ 192
Halogen Bulbs.......................................... 478
High/Low Beam Changer.......................... 192
On Reminder............................................ 200
Heated Seats................................................. 12
Heater.......................................................... 210
Heater.......................................................... 213
Highbeam On Light...................................... 242
Highway Hypnosis........................................ 381
Hill and Mountain Roads.............................. 382
Hood
Checking Things Under............................. 434
Release.................................................... 435
Horn............................................................ 189
How to Use This Manual................................. 3
How to Wear Safety Belts Properly................ 43
I
Ignition Positions.......................................... 137
Infants and Young Children, Restraints........... 64
Ination - Tire Pressure................................ 490
Instrument Panel
Overview.................................................. 186
Instrument Panel (I/P)
Brightness................................................. 203
Cluster...................................................... 225
J
Jump Starting............................................... 467
K
Keyless Entry System.................................. 112
Keys............................................................ 111
L
Labeling, Tire Sidewall................................. 484
Lamps
Auxiliary Roof Mounted Lamp................... 203
Battery Run-Down Protection.................... 204
Dome....................................................... 203
599

Lamps (cont.)
Dome Lamp Override................................ 204
Exterior..................................................... 199
Fog ........................................................... 202
Reading.................................................... 204
LATCH System
Child Restraints.......................................... 73
Level Control................................................ 404
License Plate Lamps.................................... 480
Liftgate, Power............................................. 125
Liftgate/Liftglass............................................ 123
Liftglass/Liftgate............................................ 123
Light
Airbag Readiness...................................... 227
Anti-Lock Brake System Warning.............. 233
Brake System Warning............................. 232
Charging System...................................... 230
Cruise Control........................................... 242
Fog Lamp................................................. 241
Highbeam On........................................... 242
Low Fuel Warning..................................... 243
Malfunction Indicator................................. 236
Oil Pressure.............................................. 240
Passenger Airbag Status Indicator............. 228
Passenger Safety Belt Reminder............... 227Light (cont.)
Safety Belt Reminder................................ 226
Security.................................................... 241
StabiliTrak
®Indicator................................. 234
Tire Pressure............................................ 235
Tow/Haul Mode......................................... 242
Lighting
Entry......................................................... 204
Exit........................................................... 204
Loading Your Vehicle.................................... 390
Locking Rear Axle........................................ 347
Lockout Protection........................................ 122
Locks
Delayed Locking....................................... 121
Door......................................................... 120
Lockout Protection.................................... 122
Power Door.............................................. 121
Programmable Automatic Door Locks........ 121
Rear Door Security Locks......................... 122
Loss of Control............................................ 355
Low Fuel Warning Light............................... 243
Luggage Carrier........................................... 175
Lumbar
Power Controls........................................... 11
600