
Fuses Usage
4WD Four-Wheel Drive System
HTR A/C Climate Control System
LOCKPower Door Lock Relay
(Lock Function)
HVAC 1Inside Rearview Mirror, Climate
Control System
L DOORDriver's Door Harness
Connection
CRUISE Cruise Control
UNLOCKPower Door Lock Relay
(Unlock Function)
RR FOG LP Rear Fog Lamp (Export Only)
BRAKE Anti-Lock Brake System
DRIVER UNLOCKPower Door Lock Relay
(Driver's Door Unlock Function)
IGN 0 PCM, TCM
TBC IGN 0 Truck Body Controller
VEH CHMSLVehicle and Trailer High
Mounted Stoplamp
LT TRLR ST/TRN Left Turn Signal/Stop TrailerFuses Usage
LT TRNLeft Turn Signals and
Sidemarkers
VEH STOPVehicle Stoplamps, Brake
Module, Electronic Throttle
Control Module
Body Harness Connector
RT TRLR ST/TRN Right Turn Signal/Stop Trailer
RT TRNRight Turn Signals and
Sidemarkers
DDM Driver Door Module
AUX PWR 2Rear Cargo Area Power
Outlets
LOCKS Power Door Lock System
ECCRear Electronic Climate
Control, Liftgate
TBC 2C Truck Body Controller
FLASH Flasher Module
CB LT DOORSLeft Power Window Circuit
Breaker
TBC 2B Truck Body Controller
TBC 2A Truck Body Controller
5-113

Underhood Fuse BlockThe 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.
See
Engine Compartment Overview on page 5-10for
more information on its location.
5-115

*1Ð Gasoline Engine and Fuel Injection Rail #2.
*2Ð Gasoline Engine and Fuel Injection Rail #1.
*3Ð Gasoline Engine; Oxygen Sensors.
*4Ð Gasoline Engine; Oxygen Sensors.
*5Ð PCM Ignition
Fuses Usage
GLOW PLUG Not Used
CUST FEED Accessory Power
STUD #1 Auxiliary Power
MBECMid Bussed Electrical Center
Power Feed, Front Seats,
Right Doors
BLOWER Front Climate Control Fan
LBECLeft Bussed Electrical Center,
Door Modules, Door Locks,
Auxiliary Power Outlet - Rear
Cargo Area and Instrument
Panel
STUD 2Accessory Power/Trailer Wiring
Brake Feed
Fuses Usage
ABS Anti-Lock Brakes
VSES/ECAS Vehicle Stability
IGN A Ignition Power
IGN B Ignition Power
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
STARTER Starter Relay
INTPARK Interior Lamps
STOP LP Stoplamps
TBC BATTTruck Body Controller
Battery Feed
SUNROOF Sunroof
5-117

Fuses Usage
SEO B2 Off-Road Lamps
4WSVent Solenoid
Canister/Quadrasteer Module
Power
RR HVAC Rear Climate Control
AUX PWRAuxiliary Power
Outlet - Console
IGN 1 Ignition Relay
PCM 1 Powertrain Control Module
ETC/ECMElectronic Throttle Control,
Electronic Brake Controller
INJ 1Ignition Coil, Fuel
Injectors - Bank 1
INJ 2Ignition Coil, Fuel
Injectors - Bank 2
IGN EInstrument Panel Cluster,
Air Conditioning Relay,
Turn Signal/Hazard Switch,
Starter Relay
RTD Ride Control
TRL B/U Backup Lamps Trailer WiringFuses Usage
PCM BPowertrain Control Module,
Fuel Pump
F/PMP Fuel Pump (Relay)
O2A Oxygen Sensors
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
O2B Oxygen Sensors
SIRSupplemental In¯atable Restraint
System
FRT PARKFront Parking Lamps,
Sidemarker Lamps
DRL Daytime Running Lamps (Relay)
SEO IGN Rear Defog Relay
TBC IGN1 Truck Body Controller Ignition
HI HDLP - LT High Beam Headlamp - Left
5-118

Fuses Usage
LH HIDLeft Hand High Intensity
Discharge Lamps
DRL Daytime Running Lamps
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
RR WPR Rear Wiper/Washer
RADIO Audio System
SEO B1Mid Bussed Electrical Center,
HomeLink, Rear Heated Seats
LO HDLP - LT Headlamp Low Beam - Left
BTSIBrake Transmission Shift
Interlock SystemFuses Usage
CRANK Starting System
LO HDLP - RT Headlamp Low Beam - Right
FOG LP Fog Lamp Relay
FOG LP Fog Lamps
HORN Horn Relay
W/S WASHWindshield and Rear Window
Washer Pump Relay
W/S WASHWindshield and Rear Window
Washer Pump
INFO OnStar/Rear Seat Entertainment
RADIO AMP Radio Ampli®er
RH HIDRight Hand High Intensity
Discharge Lamp
HORN Horn Fuse
EAP Electric Adjustable Pedals
TREC All-Wheel Drive Module
SBA Supplemental Brake Assist
5-119

Driving On Grades..........................................4-63
Driving on Off-Road Hills.................................4-22
Driving on Snow or Ice....................................4-41
Driving Through Deep Standing Water...............4-34
Driving Through Flowing Water.........................4-34
Driving Uphill..................................................4-23
Driving with a Trailer.......................................4-61
DVD
Cleaning the Video Screen..........................3-102
Distortion....................................................3-99
Rear Seat Entertainment System...................3-83
DVD Player....................................................3-83
E
Easy Exit Seat...............................................2-74
Electrical System
Add-On Equipment.....................................5-111
Fuses and Circuit Breakers.........................5-111
Power Windows and Other Power
Options.................................................5-111
Windshield Wiper Fuses.............................5-111
Emissions Inspection and Maintenance
Programs...................................................3-46Engine
Air Cleaner/Filter.........................................5-16
Battery.......................................................5-41
Check and Service Engine Soon Light............3-44
Coolant......................................................5-22
Coolant Heater............................................2-32
Coolant Temperature Gage...........................3-42
Engine Compartment Overview......................5-10
Exhaust.....................................................2-41
Fan Noise..................................................5-34
Oil .............................................................5-11
Overheating................................................5-26
Starting......................................................2-31
ENGINE COOLANT HOT.................................3-61
Engine Oil Additives........................................5-14
ENGINE OVERHEATED..................................3-61
Entertainment System
Cleaning the Video Screen..........................3-102
DVD Distortion............................................3-99
Entry Lighting.................................................3-19
Environmental Concerns..................................4-19
Erasing HomeLink
žButtons..............................2-53
Event Data Records (EDR)................................ 7-8
Exit Lighting...................................................3-19
Extender, Safety Belt.......................................1-27
Exterior Lamps...............................................3-15
6

F
Filter
Engine Air Cleaner......................................5-16
Finding a Program Type (PTY) Station
(RDS and XMŸ).........................................3-72
Finding a Station............................................3-70
Finish Care..................................................5-106
Finish Damage.............................................5-108
Fixed Mast Antenna.......................................3-102
Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-82
Flat Tire, Changing.........................................5-83
Fluid
Automatic Transmission................................5-19
Power Steering...........................................5-35
Windshield Washer......................................5-36
FM Stereo....................................................3-100
Fog Lamps....................................................3-18
Following Distance..........................................4-62
Front Axle......................................................5-50
Fuel............................................................... 5-4
Additives...................................................... 5-5
California Fuel.............................................. 5-5
Filling a Portable Fuel Container..................... 5-8
Filling Your Tank........................................... 5-6
Fuels in Foreign Countries.............................. 5-6
Gage.........................................................3-48
Gasoline Octane........................................... 5-4Fuel (cont.)
Gasoline Speci®cations.................................. 5-5
Low Warning Light.......................................3-48
Fuel Information Button....................................3-52
FUEL LEVEL LOW.........................................3-62
Fuses
Fuses and Circuit Breakers.........................5-111
Windshield Wiper.......................................5-111
G
Gage
Engine Coolant Temperature.........................3-42
Fuel..........................................................3-48
Oil Pressure...............................................3-46
Speedometer..............................................3-35
Tachometer.................................................3-35
Transmission Temperature.............................3-43
Voltmeter Gage...........................................3-39
Garage Door Opener.......................................2-50
Gasoline
Octane........................................................ 5-4
Speci®cations............................................... 5-5
Gate Operator and Canadian Programming........2-52
Getting Familiar with Off-Road Driving................4-20
Glove Box.....................................................2-54
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
7

When to Add Engine Oil..................................5-12
When to Change Engine Oil
(GM Oil Life System)...................................5-15
When to Check..............................................5-71
When to Check and Change............................5-19
When to Check Lubricant.................................5-49
When to Check Power Steering Fluid................5-35
When to Inspect.............................................5-16
When You Are Ready to Leave After Parking
on a Hill.....................................................4-64
Where to Put the Restraint...............................1-37
Why Safety Belts Work..................................... 1-9
Windows.......................................................2-25
Power........................................................2-26
Windshield Washer.........................................3-10
Fluid..........................................................5-36Windshield Wiper
Blade Replacement......................................5-62
Fuses......................................................5-111
Windshield Wipers..........................................3-10
Winter Driving................................................4-40
X
XMŸ Satellite Radio Antenna System..............3-102
XMŸ Satellite Radio Service
(48 Contiguous US States)..................3-69, 3-100
Y
Your Vehicle and the Environment....................... 6-2
18