Device Usage
HDLR 2 Headliner Wiring Connector
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 DOORRight Power Windows Circuit
Breaker
SPARE Not Used
INFOInfotainment Harness
ConnectionUnderhood Fuse Block
The underhood fuse block in the engine
compartment on the driver’s side of the vehicle
near the battery. Lift the cover for access to
the fuse/relay block.
To remove fuses hold the end of the fuse between
your thumb and index nger and pull straight out.
SeeEngine Compartment Overview on page 480
for more information on its location.
603
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
Fuses Usage
LBEC 1Left Bussed Electrical Center,
Left Doors, Truck Body
Controller, Flasher Module
TRL PARK Parking Lamps Trailer Wiring
RR PARKRight Rear Parking and
Sidemarker Lamps
LR PARKLeft Rear Parking and
Sidemarker Lamps
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 PWRAuxiliary Power Outlet —
Console
PCM 1 Powertrain Control Module
ETC/ECMElectronic Throttle Control,
Electronic Brake
Controller-Gasoline Engine,
Fan Clutch-Diesel EnginesFuses Usage
IGN EInstrument Panel Cluster, Air
Conditioning Relay, Turn
Signal/Hazard Switch,
Starter Relay
RTD Ride Control
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-LT High Beam Headlamp-Left
LH HID Not Used
606
(e)Make sure the safety belt reminder light and all
your belts, buckles, latch plates, retractors, and
anchorages are working properly. Look for
any other loose or damaged safety belt system
parts. If you see anything that might keep a safety
belt system from doing its job, have it repaired.
Have any torn or frayed safety belts replaced. Also
look for any opened or broken airbag coverings,
and have them repaired or replaced. The
airbag system does not need regular maintenance.
(f)Lubricate all key lock cylinders, body door
hinges, hood latch assembly, secondary latch,
pivots, spring anchor, release pawl, tailgate hinges,
tailgate linkage, tailgate handle pivot points,
latch bolt, fuel door hinge, locks, and folding seat
hardware. More frequent lubrication may be
required when exposed to a corrosive
environment. Applying silicone grease on
weatherstrips with a clean cloth will make them
last longer, seal better, and not stick or squeak.
(g)Check vent hose at transfer case for kinks and
proper installation.(h)Change automatic transmission uid and lter
if the vehicle Gross Vehicle Weight Rating
(GVWR) is over 8600 lbs or if the vehicle is mainly
driven under one or more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
(i)Drain, ush, and re ll cooling system. This
service can be complex; you should have
your dealer perform this service. See Engine
Coolant on page 502 for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap,
and ller neck. Pressure test the cooling
system and pressure cap.
(j)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and
repaired and the uid level checked. Add uid if
needed.
624
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
Fuses
Center Instrument Panel Fuse Block........ 602
Fuses and Circuit Breakers...................... 600
Instrument Panel Fuse Block................... 600
Underhood Fuse Block............................. 603
Windshield Wiper..................................... 599
G
Gage
Engine Coolant Temperature.................... 256
Fuel......................................................... 264
Oil Pressure............................................. 262
Speedometer........................................... 246
Tachometer.............................................. 246
Transmission Temperature........................ 257
Voltmeter Gage........................................ 253
Garage Door Opener..........................191, 192
Gasoline
Octane..................................................... 470
Speci cations........................................... 471
Glove Box................................................... 202
GM Mobility Reimbursement Program.......... 643
H
Hazard Warning Flashers............................ 212
Head Restraints............................................ 18
Headlamps.........................................221, 533
Automatic Headlamp System.................... 223
Bulb Replacement.................................... 532
Daytime Running Lamps.......................... 222
Flash-to-Pass........................................... 216
Front Turn Signal, Sidemarker and
Daytime Running Lamps....................... 534
Halogen Bulbs......................................... 532
High/Low Beam Changer......................... 215
On Reminder........................................... 222
Pickup Box Identi cation and Fender
Marker Lamps...................................... 538
Roof Marker Lamps................................. 535
Heated Seats................................................ 11
Heater................................................230, 231
Heater......................................................... 235
Highbeam On Light..................................... 263
Highway Hypnosis....................................... 399
Hill and Mountain Roads............................. 400
Hood
Checking Things Under............................ 478
Release................................................... 479
665
Light (cont.)
Passenger Airbag Status Indicator............ 250
Safety Belt Reminder............................... 247
Security................................................... 263
Tow/Haul Mode........................................ 264
Traction Off.............................................. 256
Up-Shift................................................... 254
Lighting
Entry........................................................ 227
Exit.......................................................... 227
Loading Your Vehicle................................... 409
Locking Rear Axle....................................... 366
Lockout Protection....................................... 126
Locks
Delayed Locking...................................... 122
Door........................................................ 120
Lockout Protection................................... 126
Power Door............................................. 121
Programmable Automatic Door Locks....... 123
Rear Door Security Locks........................ 126
Loss of Control........................................... 371
Low Fuel Warning Light............................... 265
Lumbar
Power Controls.......................................... 11M
Maintenance Schedule
Additional Required Services.................... 621
At Each Fuel Fill...................................... 626
At Least Once a Month............................ 626
At Least Once a Year .............................. 627
At the First 100, 1,000 and 6,000 Miles
(160, 1 600 and 10 000km).................. 625
Introduction.............................................. 614
Maintenance Footnotes............................ 623
Maintenance Record................................ 634
Maintenance Requirements...................... 614
Normal Maintenance Replacement
Parts.................................................... 632
Owner Checks and Services.................... 625
Recommended Fluids and Lubricants....... 629
Scheduled Maintenance........................... 617
Using....................................................... 615
Your Vehicle and the Environment............ 615
Malfunction Indicator Light........................... 258
Manual Seats.................................................. 9
Manual Selectable Ride............................... 365
Manual Transmission
Fluid........................................................ 500
Operation................................................. 149
667
Overheated Engine Protection
Operating Mode....................................... 508
Owner Checks and Services....................... 625
Owners, Canadian.......................................... 3
P
Paint, Damage............................................ 596
Park (P)
Shifting Into............................................. 170
Shifting Out of......................................... 172
Parking
Brake....................................................... 169
Over Things That Burn............................ 173
Passenger Airbag Status Indicator............... 250
Passenger Sensing System......................... 103
Passing....................................................... 369
Passlock
®.................................................... 133
Pickup Conversion to Chassis Cab.............. 423
Power
Accessory Outlet(s).................................. 228
Door Locks.............................................. 121
Electrical System..................................... 599
Lumbar Controls........................................ 11
Retained Accessory (RAP)....................... 137
Seat.......................................................... 10Power (cont.)
Steering Fluid.......................................... 515
Windows.................................................. 130
Programmable Automatic Door Locks.......... 123
Q
Questions and Answers About Safety Belts ... 26
R
Radios........................................................ 289
AM-FM Radio.......................................... 291
Care of Your Cassette Tape Player.......... 350
Care of Your CD and DVD Player............ 352
Care of Your CDs and DVDs................... 352
Radio with Cassette and CD.................... 304
Radio with CD......................................... 294
Radio with Six-Disc CD............................ 318
Rear Seat Audio...................................... 347
Setting the Time for Radios with Radio
Data Systems (RDS)............................ 291
Setting the Time for Radios without
Radio Data Systems (RDS).................. 290
Theft-Deterrent......................................... 348
Understanding Reception......................... 350
669