Page 506 of 570
Fuses Usage
LT TRNLeft Turn Signals and
Sidemarkers
VEH STOPVehicle Stoplamps, Brake
Module, Electronic Throttle
Control Module
RT TRLR ST/TRN Right Turn Signal/Stop Trailer
RT TRNRight Turn Signals and
Sidemarkers
BODY Harness Connector
DDM Driver Door Module
LOCKSRear Doors and Liftgate
Power Lock Relay Feed
ECC Liftgate
TBC 2C Truck Body Controller
FLASH Flasher Module
CB LT DOORSLeft Rear Power Window
Circuit Breaker and Driver
Door Module
TBC 2B Truck Body Controller
TBC 2A Truck Body Controller
Circuit Breaker Usage
AUX PWR 2 Midgate Controller (SUT Only)
Center Instrument Panel Fuse Block
The center instrument panel utility block is
located underneath the instrument panel, to the
left of the steering column.
Device Usage
SEO Special Equipment Option
TRAILERTrailer Brake Wiring,
Off-Road Lamps Harness
Connector
UPFIT Up tter (Not Used)
SL RIDE Ride Control (Not Used)
HDLR 2Headliner Wiring
Connector 2
506
Page 507 of 570
Device Usage
BODY Body Wiring Connector
DEFOG Rear Defogger Relay
HDLNR 1 Headliner Wiring Connector 1
SPARE RELAY Not Used
CB SEATDriver and Passenger Seat
Module Circuit Breaker
CB RT DOORRear Right Power Window,
Passenger Door Module
SPARE Not Used
INFO Not UsedUnderhood Fuse Block
The underhood fuse block in the engine
compartment is located on the driver’s side of
the vehicle near the battery. Lift the cover for
access to the fuse/relay block.
To remove fuses if you don’t have a fuse extractor,
hold the end of the fuse between your thumb
and index nger and pull straight out.
SeeEngine Compartment Overview on page 402
for more information on its location.
507
Page 510 of 570

Fuses Usage
PARK LP Parking Lamps Relay
STRTR Starter Relay
INTPARK Roof Marker Lamps
STOP LP Stoplamps
TBC BATTTruck Body Controller
Battery Feed
SEO B2 Off-Road Lamps
4WS Not Used
AUX PWRInstrument Panel Outlets,
Rear Cargo Area Power
Outlets, 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, Electronic Brake
Controller TC2 Mode Switch
RTDElectronic Brake Controller
Battery FeedFuses Usage
TRL B/U Backup Lamps Trailer Wiring
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 HID Not Used
DRL Daytime Running Lamps
510
Page 511 of 570
Fuses Usage
RVC Regulated Voltage Control
IPC/DICInstrument Panel Cluster/
Driver Information Center
HVAC/ECASClimate Control
Controller/Electronically
Controlled Air Suspension
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 Rear Wiper/Washer
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 Not Used
FOG LP Not Used
HORN Horn Relay
W/S WASHWindshield and Rear Window
Washer Pump Relay
W/S WASHWindshield and Rear Window
Washer Pump
INFO OnStar
®
RADIO AMP Radio Ampli er
RH HID Not Used
HORN Horn
EAP Not Used
TREC Four-Wheel Drive Module
SBA Not Used
511
Page 559 of 570

D
Daytime Running Lamps............................. 188
Defensive Driving........................................ 302
Delayed Locking.......................................... 102
Doing Your Own Service Work.................... 393
Dome Lamp Override.................................. 191
Dome Lamps............................................... 191
Door
Delayed Locking...................................... 102
Locks....................................................... 100
Power Door Locks................................... 101
Programmable Automatic Door Locks....... 102
Rear Door Security Locks........................ 102
Driver
Position, Safety Belt................................... 29
Driver Information Center (DIC)................... 222
DIC Operation and Displays..................... 222
DIC Vehicle Customization....................... 234
DIC Warnings and Messages................... 226
Driving
At Night................................................... 342
City.......................................................... 347
Defensive................................................. 302
Drunken................................................... 303Driving (cont.)
First Aid and Tool Kit............................... 360
Freeway................................................... 348
Front Mounted Receiver........................... 360
Hill and Mountain Roads.......................... 351
In Rain and on Wet Roads...................... 344
Off-Road.................................................. 317
Power Winch Platform .............................. 361
Recovery Loops....................................... 358
Rocking Your Vehicle to Get it Out.......... 358
Winter...................................................... 353
Dual Automatic Climate Control System......... 197
DVD
Rear Seat Entertainment System............. 271
E
Electrical System
Add-On Equipment................................... 503
Center Instrument Panel Fuse Block........ 506
Fuses and Circuit Breakers...................... 504
Instrument Panel Fuse Block................... 504
Power Windows and Other Power
Options................................................. 503
559
Page 565 of 570

P
Paint, Damage............................................ 499
Park Aid...................................................... 192
Park (P)
Shifting Into............................................. 134
Shifting Out of......................................... 135
Parking
Brake....................................................... 133
Over Things That Burn............................ 136
Passing....................................................... 314
Passlock
®.................................................... 118
Power
Accessory Outlet(s).................................. 196
Door Locks.............................................. 101
Electrical System..................................... 503
Lumbar Controls.......................................... 9
Reclining Seatbacks................................... 12
Retained Accessory (RAP)....................... 121
Seat............................................................ 8
Steering Fluid.......................................... 425
Windows.................................................. 112
Power Winch Platform................................. 361
Programmable Automatic Door Locks.......... 102
Q
Questions and Answers About
Safety Belts............................................... 28
R
Radios........................................................ 241
Care of Your Cassette Tape Player.......... 297
Care of Your CD and DVD Player............ 300
Care of Your CDs and DVDs................... 299
Navigation/Radio System,
see Navigation Manual......................... 271
Radio with Cassette and CD.................... 243
Radio with Six-Disc CD............................ 256
Rear Seat Audio...................................... 294
Setting the Time...................................... 243
Theft-Deterrent......................................... 295
Understanding Reception......................... 297
Reading Lamps........................................... 192
Rear Axle.................................................... 437
Locking.................................................... 311
Rear Door Security Locks........................... 102
Rear Heated Seats....................................... 15
565
Page 570 of 570

W
Warning Lights, Gages and Indicators......... 204
Warnings
DIC Warnings and Messages................... 226
Hazard Warning Flashers......................... 176
Other Warning Devices............................ 177
Safety and Symbols..................................... 4
Vehicle Damage.......................................... 5
Wheels
Alignment and Tire Balance..................... 463
Different Size........................................... 461
Replacement............................................ 464
Where to Put the Restraint............................ 57
Windows..................................................... 111
Power...................................................... 112Windshield
Backglass, and Wiper Blades, Cleaning..... 498
Washer.................................................... 181
Washer Fluid........................................... 426
Wiper Blade Replacement........................ 447
Wiper Fuses............................................ 503
Wipers..................................................... 180
Windshield, Rear Washer/Wiper................... 182
Winter Driving............................................. 353
X
XM Radio Messages................................... 269
XM™ Satellite Radio Antenna System......... 300
Y
Your Vehicle and the Environment............... 515
570