Page 358 of 427
6-46
5. Turn the vertical aiming screw (V) 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.
Front Turn Signal, Sidemarker and
Daytime Running Lamps
A. Low-Beam Headlamp
B. Daytime Running Lamp
C. Sidemarker Lamp
D. High
-Beam Headlamp
E. Front Turn Signal Lamp
Page 359 of 427
6-47
1. Remove the headlamp assembly as described
previously.
2. Remove the rubber, circular
-shaped bulb cap for the
affected bulb from the headlamp assembly.
3. Press the locking release lever, turn the bulb
socket counterclockwise and remove it from the
headlamp assembly. (There is no lock for the
sidemarker lamp.)
4. Remove the old bulb from the bulb socket.
5. Put the new bulb into the bulb socket.
6. Put the bulb socket into the turn signal housing and
turn it clockwise until it locks. (There is no lock for
the sidemarker lamp.)
7. Reinstall the rubber, circular
-shaped bulb cap to the
headlamp assembly.
8. Put the headlamp assembly back into the vehicle by
reversing the previous mentioned steps.
Center High Mounted Stoplamp (CHMSL)
It is recommended that this component be replaced as a
unit by your dealer.
Taillamps
A. Stop Lamp/Tail Lamp
B. Turn Signal Lamp/
Tail Lamp
C. Back
-Up Lamp
Page 369 of 427

6-57
Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
CAUTION:
Using the wrong replacement wheels, wheel bolts
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use the
correct wheel, wheel bolts and wheel nuts for
replacement.
NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and clearance to
the body and chassis.
See ªChanging a Flat Tireº in the Index for more
information.
Used Replacement Wheels
CAUTION:
Putting a used wheel on your vehicle is
dangerous. You can't know how it's been used or
how far it's been driven. It could fail suddenly
and cause a crash. If you have to replace a wheel,
use a new GM original equipment wheel.
Page 386 of 427
6-74
Name Usage
ATC Automatic Transfer Case
RR DEFOG Rear Window Defogger, Heated
Mirrors (Relay)
RTD Autoride (Real Time Damping)
RR PRK Right Rear Parking Lamps
ECM B VCM/PCM
F/PMP Fuel Pump (Relay)
O2 A Oxygen Sensors
O2 B Oxygen Sensors
LR PRK Left Rear Parking Lamps
RR DEFOG Rear Window Defogger,
Heated Mirrors
HDLP Headlamps (Relay)
TRL PRK Parking Lamps Trailer Wiring
PRIME Not Used
RT HDLP Right Headlamps
DRL Daytime Running Lamps (Relay)Name Usage
HTD MIR Heated Mirrors
LT HDLP Left Headlamps
A/C Air Conditioning
AUX PWR Cigarette Lighter, Auxiliary
Power Outlets
SEO 2 Special Equipment Option Power,
Power Seats
SEO 1 Special Equipment Option Power
DRL Daytime Running Lamps
A/C A/C (Relay)
FOG LP Fog Lamps
FOG LP Fog Lamps (Relay)
RADIO Audio System, Instrument Cluster,
Climate Control System
CIGAR Cigarette Lighter, Auxiliary
Power Outlets
RT TURN Right Turn Signals
BTSI Automatic Transmission Shift
Lock Control System
Page 387 of 427

6-75
Name Usage
LT TURN Left Turn Signals
FR PRK Front Parking Lamps,
Sidemarker Lamps
W/W PMP Windshield Washer Pump
HORN Horn (Relay)
IGN C Ignition Switch, Fuel Pump,
PRND321 Display, Crank
RDO AMP Radio Amplifier
HAZ LP Exterior Lamps, Hazard Lamps
EXP LPS Not Used
HORN Horn
CTSY LP Interior Lamps
RR WPR Rear Wipers
TBC Body Control Module, Remote
Keyless Entry, HeadlampsReplacement Bulbs
Bulb Number
Low
-Beam Headlamps 9006. . . . . . . . . . . . . . . . . . .
High
-Beam Headlamps 9005 or. . . . . . . . . . . . . . . . .
9005 Long Life
Daytime Running Lamps (DRL) 4157K. . . . . . . . . . .
(Preferred) or 3157KX
Front Sidemarker Lamp 194. . . . . . . . . . . . . . . . . . . .
Front Parking and Turn Lamp 3157 or. . . . . . . . . . . .
3157K Long Life
Taillamp and Stop Lamp 3057. . . . . . . . . . . . . . . . . .
Rear Turn Signal Lamp and Stop Lamp 3057. . . . . .
Back
-up Lamp 3157. . . . . . . . . . . . . . . . . . . . . . . . . .
For replacement bulbs not listed here, please consult
your dealer.