2004 HUMMER H2 turn signal

The trailer towing harness contains the following trailer
circuits:
Yellow: Left Stop/Turn Signal
Dark Green: Right Stop/Turn Signal
Brown: Taillamps
White: Ground
Light Green: Back-up Lamps
Light Blue: Center High-Mounted
Stoplamp (CHMSL)
Red: Battery Feed
Dark Blue: Trailer BrakeA jumper harness for an electric trailer brake controller
and a trailer battery feed fuse may be included with
this trailering package. See “Instrument Panel Jumper
Wiring Harness” later in this section.
If you need to tow a light-duty trailer with a standard
four-way, round pin connector, an adapter may be
included. See “Four-Wire Harness Adapter” later in this
section.
4-85

Service............................................................5-3
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of Your
Vehicle......................................................5-5
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-6
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-7
Filling Your Tank............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under the Hood....................5-10
Hood Release..............................................5-10
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-14
Engine Air Cleaner/Filter................................5-19
Automatic Transmission Fluid.........................5-21
Engine Coolant.............................................5-24
Coolant Surge Tank Pressure Cap..................5-27
Engine Overheating.......................................5-27
Cooling System............................................5-30Engine Fan Noise.........................................5-35
Power Steering Fluid.....................................5-36
Windshield Washer Fluid................................5-37
Brakes........................................................5-38
Battery........................................................5-42
Jump Starting...............................................5-43
All-Wheel Drive..............................................5-48
Rear Axle.......................................................5-50
Front Axle......................................................5-51
Bulb Replacement..........................................5-52
Halogen Bulbs..............................................5-52
Headlamps..................................................5-52
Front Turn Signal and Parking Lamps..............5-53
Sidemarker Lamps........................................5-54
Daytime Running Lamps................................5-54
Roof Marker Lamps......................................5-55
Center High-Mounted Stoplamp (CHMSL).........5-57
Taillamps.....................................................5-57
Replacement Bulbs.......................................5-58
Windshield Wiper Blade Replacement..............5-59
Section 5 Service and Appearance Care
5-1

4. Unplug the electrical
connector.
5. Push the new bulb/socket into the headlamp
assembly making sure to align the splines on
the bulb/socket with the splines in the headlamp
housing. Use care not to touch the bulb with
your ngers or hands.
6. Turn the bulb/socket retainer clockwise to lock the
bulb/socket in place.
7. Plug in the electrical connector.Front Turn Signal and Parking
Lamps
1. Open the hood as described earlier underHood
Release on page 5-10and locate the affected lamp.
2. Turn the bulb socket
counterclockwise and
remove it from the lamp
housing.
3. Pull the bulb from the bulb socket.
4. Put the new bulb into the bulb socket.
5. Put the bulb socket into the lamp housing and turn
it clockwise until it locks.
5-53

Center High-Mounted Stoplamp
(CHMSL)
If your vehicle has this component and it needs
replacement, it is recommended that it be replaced as a
unit by your dealer.
Taillamps
A. Stoplamp
B. Turn Signal Lamp
C. Back-Up Lamp
1. Open the liftgate.2. Remove the two
screws from the rear
lamp assembly
and remove the rear
lamp assembly.
3. Turn the bulb socket counterclockwise to remove it
from the taillamp housing.
5-57

4. Pull the bulb straight
out from the socket.
5. Press a new bulb into the socket, insert it into the
taillamp housing and turn the socket
counterclockwise until it is locked in place.
6. Reinstall the rear lamp assembly and tighten the
screws.Replacement Bulbs
Exterior Lamp Bulb Number
Low-Beam and High-Beam
Headlamps9007
Daytime Running Lamps (DRL) 4114K
Front Turn Signal and Parking
Lamps4157K or 3157KX
Rear Taillamp and Stoplamp 3157
Rear Turn Lamp 3157
Back-up Lamp 4157 or 3157
Roof Marker Lamps 168
For replacement bulbs not listed here, please consult
your dealer.
5-58

Fuses Usage
HTR A/C Not Used
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 Not Used
BRAKE Brake Switch
DRIVER UNLOCKPower Door Lock Relay
(Driver’s Door Unlock
Function)
IGN 0Brake Transmission Shift
Interlock, Powertrain Control
Module, Transmission
TBC IGN 0 Truck Body Controller
VEH CHMSLVehicle and Trailer High
Mounted Stoplamp
LT TRLR ST/TRN Left Turn Signal/Stop Trailer
LT TRNLeft Turn Signals and
SidemarkersFuses Usage
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
AUX PWR 2Instrument Panel Outlets,
Rear Cargo Area Power
Outlets
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
5-104

Fuses Usage
IGN 1 PCM Ignition
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, Electronic Brake
Controller TC2 Mode Switch
RTDElectronic Brake Controller
Battery Feed
TRL B/U Backup Lamps Trailer Wiring
PCM BPowertrain Control Module,
Fuel Pump
F/PMP Fuel Pump (Relay)
02A Oxygen Sensors
B/U LPBack-up Lamps, Automatic
Transmission Shift Lock
Control SystemFuses Usage
RR DEFOG Rear Window Defogger
HDLP-HI Headlamp High Beam Relay
PRIME Not Used
O2B Oxygen Sensors
SIRSupplemental Inatable
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
DRL Daytime Running Lamps
IPC/DICInstrument Panel
Cluster/Driver Information
Center
HVAC/ECASClimate Control
Controller/Electronically
Controlled Air Suspension
CIG LTR Cigarette Lighter
5-109

Audio System(s) (cont.)
Theft-Deterrent Feature................................3-88
Understanding Radio Reception.....................3-90
Automatic Climate Control System.....................3-19
Automatic Dimming Mirror Operation..................2-35
Automatic Headlamp System............................3-14
Automatic Transmission
Fluid..........................................................5-21
Operation...................................................2-22
B
Backing Up....................................................4-82
Battery..........................................................5-42
BATTERY NOT CHARGING.............................3-57
Battery Replacement......................................... 2-5
Battery Run-Down Protection............................3-17
Before Leaving on a Long Trip.........................4-48
Before You Go Off-Roading..............................4-17
Bench Seat, Split (60/40)................................... 1-8
Brake
Parking......................................................2-29
System Warning Light..................................3-33
Brake Adjustment............................................5-42
Brake and Throttle Operation Techniques for
Off-Road Driving..........................................4-27
Brake Fluid....................................................5-38
Brake Pedal Travel.........................................5-42Brake Wear...................................................5-41
Brakes..........................................................5-38
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-9
Break-In, New Vehicle.....................................2-18
Bulb Replacement...........................................5-52
Center High-Mounted Stoplamp (CHMSL)........5-57
Daytime Running Lamps...............................5-54
Front Turn Signal and Parking Lamps.............5-53
Halogen Bulbs............................................5-52
Headlamps.................................................5-52
Replacement Bulbs......................................5-58
Roof Marker Lamps.....................................5-55
Sidemarker Lamps.......................................5-54
Taillamps....................................................5-57
Buying New Tires...........................................5-71
C
California Fuel.................................................. 5-6
Canada – Customer Assistance.......................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-7
Capacities and Specications..........................5-111
Carbon Monoxide...................4-52, 4-75, 2-13, 2-33
Care of
Safety Belts................................................5-95
Your Cassette Tape Player............................3-90
2