Page 372 of 484
13. Place the headlamp assembly back into the vehicle,
being sure to align the lower locator tab with the
pocket on the vehicle (see arrow). Push the
headlamp assembly straight in and then down into
position.
14. Install the two pins and snap the ends into their
locked position.
15. Reinstall the grille and radiator cover by reversing
the removal procedure described previously.
Front Turn Signal, Sidemarker and
Daytime Running Lamps
A. Low-Beam Headlamp
B. Daytime Running
Lamp (DRL)
C. Sidemarker LampD. High-Beam
Headlamp
E. Front Parking/Turn
Signal Lamp
5-56
Page 373 of 484
To replace a front turn signal, sidemarker or DRL bulb,
do the following:
1. Remove the headlamp assembly as described
previously. SeeHeadlamps on page 5-53for
more information.
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. Reverse the steps to reinstall.Taillamps, Turn Signal, Stoplamps
and Back-up Lamps
To replace one of these bulbs, do the following:
A. Stoplamp/Taillamp
B. Turn Signal
Lamp/Taillamp
C. Back-up Lamp
1. Open the tailgate. SeeTailgate on page 2-19
for more information.
5-57
Page 374 of 484
2. Remove the
two screws from the
taillamp assembly.
3. Remove the taillamp assembly.
4. Press the release tab and turn the bulb socket
counterclockwise to remove it from the taillamp
assembly.
5. Pull the bulb straight out from the socket.
6. Press a new bulb into the socket, insert it into
the taillamp assembly and turn the bulb socket
clockwise until it clicks.
7. Reinstall the taillamp assembly and tighten
the screws.Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp, Rear Turn Signal,
Stoplamp and Taillamp3157K
Daytime Running Lamp (DRL) 4114K
Front Turn Signal Lamps 3157AK
High-Beam Headlamp 9005 or 9005 LL
Sidemarker Lamp 194
For replacement bulbs not listed here, contact your
dealer.
5-58
Page 387 of 484

The TPMS sensor matching process is outlined below:
1. Set the parking brake.
2. Turn the ignition switch to RUN with the engine off.
3. Turn the headlamp switch from off to the parking
lamps setting four times within three seconds.
A double horn chirp will sound and the TPMS low
tire warning light will begin to ash. The double horn
chirp and ashing TPMS warning light indicate
that the TPMS matching process has started.
The TPMS warning light should continue ashing
throughout the matching procedure. The SERVICE
TIRE MONITOR message will be displayed on
the Driver Information Center (DIC).
4. Start with the driver’s side front tire.
5. Remove the valve cap from the valve cap stem.
Activate the TPMS sensor by increasing or
decreasing the tire’s air pressure for 10 seconds,
then stop and listen for a single horn chirp.
The single horn chirp should sound within
15 seconds, con rming that the sensor identi cation
code has been matched to this tire and wheel
position. If you do not hear the con rming single
horn chirp, you will need to start over with Step 1.
To let air-pressure out of a tire you can use the
pointed end of the valve cap, a pencil-style
air pressure gage or a key.6. Proceed to the passenger’s side front tire, and
repeat the procedure in Step 5.
7. Proceed to the passenger’s side rear tire, and
repeat the procedure in Step 5.
8. Proceed to the driver’s side rear tire, and repeat the
procedure in Step 5.
9. After hearing the con rming horn chirp for the left
rear tire, check to see if the TPMS warning light is
still ashing. If it is, turn the ignition switch to
LOCK to exit the sensor matching process. If the
TPMS warning light is not ashing, the ve minute
time limit has passed and you will need to start
the process over beginning with Step 1.
10. Set all four tires to the recommended air pressure
level as indicated on the Tire and Loading
Information label.
11. Put the valve caps back on the valve stems
The spare tire does not have a TPMS sensor. If you
replace one of the road tires with the spare, the CHECK
TIRE PRESSURE message will be displayed on the
DIC screen. This message should go off once you
re-install the road tire containing the TPMS sensor.
The SERVICE TIRE MONITOR message is displayed
when the TPMS is malfunctioning. One or more missing
or inoperable TPMS sensors will cause the service
tire monitor message to be displayed. See your dealer
for service.
5-71
Page 395 of 484

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 tire or tire chain
clearance to the body and chassis.
SeeChanging a Flat Tire on page 5-81for more
information.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has been
used or how far it has been driven. It could fail
suddenly and cause a crash. If you have to
replace a wheel, use a new GM original
equipment wheel.
Tire Chains
{CAUTION:
Do not use tire chains. There is not enough
clearance. Tire chains used on a vehicle
without the proper amount of clearance can
cause damage to the brakes, suspension or
other vehicle parts. The area damaged by the
tire chains could cause you to lose control of
your vehicle and you or others may be injured
in a crash. Use another type of traction device
only if its manufacturer recommends it for use
on your vehicle and tire size combination and
road conditions. Follow that manufacturer’s
instructions. To help avoid damage to your
vehicle, drive slowly, re-adjust or remove the
device if it is contacting your vehicle, and
do not spin your wheels. If you do nd
traction devices that will t, install them on
the rear tires.
5-79
Page 432 of 484

Fuses Usage
PARK LP Parking Lamps Relay
STRTR Starter Relay
INTPARK Interior Lamps
STOP LP Stoplamps
TBC BATTTruck Body Controller
Battery Feed
SEO B2 Off-Road Lamps
4WS Not Used
AUX PWRAccessory Power
Outlet — Console
PCM 1 Powertrain Control Module
ETC/ECMElectronic Throttle Control,
Electronic Brake Controller
IGN EInstrument Panel Cluster,
Air Conditioning Relay,
Turn Signal/Hazard Switch,
Starter Relay
RTDElectronic Suspension
Control, Automatic Level
Control (ALC) Exhaust
TRL B/U Backup Lamps Trailer WiringFuses Usage
F/PMP Fuel Pump (Relay)
B/U LPBack-up Lamps, Automatic
Transmission Shift Lock
Control System
RR DEFOG Rear Window Defogger
HDLP-HI Headlamp High Beam Relay
PRIME Not Used
AIRBAGSupplemental In atable
Restraint System
FRT PARKFront Parking Lamps,
Sidemarker Lamps
DRLDaytime Running Lamps
Relay
SEO IGN Rear Defog Relay
TBC IGN1 Truck Body Controller Ignition
HI HDLP-LTDriver’s Side High Beam
Headlamp
LH HIDLeft Hand High Intensity
Discharge Lamps
DRL Daytime Running Lamps
5-116
Page 433 of 484
Fuses Usage
RVC Regulated Voltage Control
IPC/DICInstrument Panel
Cluster/Driver Information
Center
HVAC/ECAS Climate Control Controller
CIG LTR Cigarette Lighter
HI HDLP-RTPassenger’s Side High Beam
Headlamp
HDLP-LOW Headlamp Low Beam Relay
A/C COMPAir Conditioning Compressor
Relay
A/C COMP Air Conditioning Compressor
TCMB Transmission Control Module
RR WPR Not Used
RADIO Audio System
SEO B1Mid Bussed Electrical Center,
Universal Home Remote
System, Rear Heated Seats
LO HDLP-LTDriver’s Side Headlamp
Low BeamFuses Usage
BTSIBrake Transmission Shift
Interlock System
CRNK Starting System
LO HDLP-RTPassenger’s Side Headlamp
Low Beam
FOG LP Fog Lamp Relay
FOG LP Fog Lamps
HORN Horn Relay
W/S WASH Not Used
W/S WASH Not Used
INFOOnStar
®/Rear Seat
Entertainment
RADIO AMP Radio Ampli er
RH HIDRight Hand High Intensity
Discharge Lamp
HORN Horn Fuse
EAP Electric Adjustable Pedals
TRECAll-Wheel Drive Module
(If Equipped)
SBA Supplemental Brake Assist
5-117
Page 472 of 484

Ashtray(s)......................................................3-21
Audio System(s).............................................3-63
Audio Steering Wheel Controls......................3-98
Care of Your Cassette Tape Player...............3-100
Care of Your CD and DVD Player................3-101
Care of Your CDs and DVDs.......................3-101
CD Changer...............................................3-94
Chime Level Adjustment.............................3-102
Fixed Mast Antenna...................................3-101
Navigation/Radio System, see Navigation
Manual...................................................3-80
Radio with Cassette and CD.........................3-65
Rear Seat Audio (RSA)................................3-92
Setting the Time..........................................3-64
Theft-Deterrent Feature................................3-97
Understanding Radio Reception.....................3-99
XM™ Satellite Radio Antenna System...........3-102
Automatic Headlamp System............................3-15
Automatic Transmission
Fluid..........................................................5-21
Operation...................................................2-30B
Battery..........................................................5-39
Run-Down Protection...................................3-18
Before Leaving on a Long Trip.........................4-35
Brake
Anti-Lock Brake System (ABS)........................ 4-7
Emergencies................................................ 4-8
Parking......................................................2-33
System Warning Light..................................3-35
Brake Pedal, Throttle.......................................2-28
Brakes..........................................................5-36
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-25
Bulb Replacement...........................................5-52
Front Turn Signal, Sidemarker and
Daytime Running Lamps...........................5-56
Halogen Bulbs............................................5-52
Headlamp Aiming........................................5-48
Headlamps.................................................5-53
High Intensity Discharge (HID) Lighting...........5-52
Replacement Bulbs......................................5-58
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps........................................5-57
Buying New Tires...........................................5-74
2