Page 601 of 674
Fuses Usage
RR WPR Not Used
SEO ACCYSpecial Equipment Option
Accessory
WS WPR Windshield Wipers
TBC ACCYTruck Body Controller
Accessory
IGN 3 Ignition, Heated Seats
4WDFour-Wheel Drive System,
Auxiliary Battery
Fuses Usage
HTR A/C Climate Control System
LOCK (Relay)Power Door Lock Relay
(Lock Function)
HVAC 1 Climate Control System
LT DRDriver’s Door Harness
Connection
CRUISECruise Control, Power
Take Off (PTO)
UNLCK (Relay)Power Door Lock Relay
(Unlock Function)
RR FOG LP Not Used
BRAKE Anti-Lock Brake System
DRIVER UNLCKPower Door Lock Relay
(Driver’s Door Unlock
Function)
IGN 0 TCM
TBC IGN 0 Truck Body Controller
VEH CHMSLVehicle and Trailer High
Mounted Stoplamp
LT TRLR ST/TRN Left Turn Signal/Stop Trailer
601
Page 605 of 674

1*Fuel Injection Rail #2-Gasoline Engine; Engine
Control Module-Diesel Engine.
2*Fuel Injection Rail #1-Gasoline Engine;
Actuator-Diesel Engine.
3*Oxygen Sensors-Gasoline Engine; Fuel
Heater-Diesel Engine.
4*Oxygen Sensors-Gasoline Engine; Engine
Control Module 1-Diesel Engine.
5*Ignition 1-Gasoline Engine; Engine Control
Module-Diesel Engine.
6*Powertrain Control Module B-Gasoline Engine;
Engine Control Module B-Diesel Engine.
7*Supplemental Brake Assist - Gasoline Engine;
Electronic Viscous Fan - Diesel Engine.
8*Rear Climate Control.
9*Sunroof.Fuses Usage
GLOW PLUGDiesel Glow Plugs and Intake
Air Heater
CUST FEED Gasoline Accessory Power
HYBRID Hybrid
STUD #1Auxiliary Power (Single
Battery and Diesels Only)/
Dual Battery (TP2) Do not
install fuse.
MBECMid Bussed Electrical Center
Power Feed, Front Seats,
Right Doors
BLWR Front Climate Control Fan
LBECLeft Bussed Electrical Center,
Door Modules, Door Locks,
Auxiliary Power Outlet—Rear
Cargo Area and Instrument
Panel
STUD #2*Accessory Power/Trailer
Wiring Brake Feed
ABS Anti-lock Brakes
VSES/ECAS Vehicle Stability
IGN A Ignition Power
IGN B Ignition Power
605
Page 607 of 674
Fuses Usage
DRL Daytime Running Lamps
RVC Regulated Voltage Control
IPC/DICInstrument Panel
Cluster/Driver Information
Center
HVAC/ECAS Climate Control Controller
CIG LTR Cigarette Lighter
HI HDLP-RT High Beam Headlamp-Right
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,
Rear Heated Seats,
Universal Home Remote
SystemFuses Usage
LO HDLP-LT Headlamp Low Beam-Left
BTSIBrake Transmission Shift
Interlock System
CRNK Starting System
LO HDLP-RT Headlamp Low Beam-Right
FOG LP Fog Lamps Relay
FOG LP Fog Lamps
HORN Horn Relay
W/S WASHWindshield Washer
Pump Relay
W/S WASH Windshield Washer Pump
INFOOnStar
®/Rear Seat
Entertainment
RADIO AMP Radio Ampli er
RH HID Not Used
HORN Horn
EAP Not Used
TREC Not Used
607
Page 662 of 674

Cigarette Lighter.......................................... 229
Cleaning
Aluminum or Chrome-Plated Wheels........ 594
Exterior Lamps/Lenses............................. 593
Fabric/Carpet........................................... 590
Finish Care.............................................. 593
Inside of Your Vehicle.............................. 589
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 591
Leather.................................................... 591
Tires........................................................ 595
Underbody Maintenance........................... 596
Washing Your Vehicle.............................. 592
Weatherstrips........................................... 592
Windshield and Wiper Blades................... 594
Climate Control System............................... 230
Dual......................................................... 231
Dual Automatic......................................... 235
Outlet Adjustment..................................... 243
Clutch, Hydraulic......................................... 501
Collision Damage Repair............................. 651
Comfort Guides, Rear Safety Belt................. 41
Compass............................................176, 180
Content Theft-Deterrent............................... 131
Control of a Vehicle..................................... 360Coolant
Engine Temperature Gage........................ 256
Heater, Engine......................................... 139
Surge Tank Pressure Cap........................ 505
Cooling System........................................... 508
Cruise Control............................................. 217
Cruise Control Light.................................... 263
Cupholder(s)................................................ 202
Customer Assistance Information
Courtesy Transportation........................... 647
Customer Assistance for Text
Telephone (TTY) Users ......................... 642
Customer Assistance Offices.................... 642
Customer Satisfaction Procedure.............. 638
GM Mobility Reimbursement Program...... 643
Reporting Safety Defects to General
Motors.................................................. 656
Reporting Safety Defects to the
Canadian Government.......................... 656
Reporting Safety Defects to the
United States Government.................... 656
Roadside Assistance Program.................. 644
Service Publications Ordering
Information........................................... 657
662
Page 663 of 674

D
Daytime Running Lamps............................. 222
Defensive Driving........................................ 356
Delayed Locking.......................................... 122
Doing Your Own Service Work.................... 469
Dome Lamp Override.................................. 227
Dome Lamps............................................... 226
Door
Delayed Locking...................................... 122
Locks....................................................... 120
Power Door Locks................................... 121
Programmable Automatic Door Locks....... 123
Rear Door Security Locks........................ 126
Rear Doors.............................................. 126
Driver
Position, Safety Belt................................... 27
Driver Information Center (DIC)................... 265
DIC Operation and Displays..................... 266
DIC Vehicle Customization....................... 282
DIC Warnings and Messages................... 270
Driving
At Night................................................... 391
City.......................................................... 396
Defensive................................................. 356
Drunken................................................... 357
Freeway................................................... 397Driving (cont.)
Hill and Mountain Roads.......................... 400
In Rain and on Wet Roads...................... 392
Off-Road.................................................. 372
Recovery Hooks....................................... 408
Rocking Your Vehicle to Get it Out.......... 407
Winter...................................................... 402
Dual Automatic Climate Control System....... 235
Dual Climate Control System....................... 231
Dual Tire Operation..................................... 552
DVD
Rear Seat Entertainment System............. 334
E
Electrical System
Add-On Equipment................................... 599
Center Instrument Panel Fuse Block........ 602
Fuses and Circuit Breakers...................... 600
Instrument Panel Fuse Block................... 600
Power Windows and Other Power
Options................................................. 599
Underhood Fuse Block............................. 603
Windshield Wiper Fuses........................... 599
Engine
Air Cleaner/Filter...................................... 491
Battery..................................................... 520
663
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