Hummer H2. Manual - part 1028

6.0L

Air Suspension 

Compressor

Center rear of vehicle, in 
back of trailer hitch, to the 
left side of the compressor

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension 

Compressor Relay

At the left side of the 
engine compartment near 
the lower left wheel well 
below the master cylinder

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Exhaust 

Valve

Attached to the right side of 
the compressor head

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Inflator 

Switch

In the right rear of cargo 
area near the D-pillar

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Inlet 

Valve - LR

Near the right front of the 
compressor to the left of the 
inlet valve - RR

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Inlet 

Valve - RR

Near the right front of the 
compressor to the right of 
the inlet valve - LR

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Module

Center rear of vehicle, in 
back of trailer hitch, to the 
left side of the compressor

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Pressure 

Sensor - LT/RT

Center rear of vehicle, in 
back of trailer hitch, to the 
left side of the compressor

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Ride 

Height Switch

Center of I/P to the left of 
HVAC control head

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Sensor - 

LR

At the left rear frame rail 
attached to the top of the 
frame

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Suspension Sensor - 

RR

At the right rear frame rail 
attached to the top of the 
frame

Suspension Controls 

Component Views in 

Air Suspension

Suspension Controls 

Connector End Views 

in Air Suspension

Air Temperature 

Actuator - Left

Attached to the lower 
middle underside of the 
HVAC assembly below the 
evaporator and blower 
module

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Air Temperature 

Actuator - Right

At the middle top of the 
HVAC assembly behind the 
Inflatable Restraint I/P 
Module Disable Switch

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

At the middle left side of 

HVAC Component  HVAC Connector End 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wiring Systems (Component List) - Hummer H2

  

Air Temperature Sensor 

Assembly - Inside

the headliner above the 
drivers seat

Views in HVAC 

Systems - Automatic

Views in HVAC 

Systems - Automatic

Air Temperature Sensor - 

Lower Left

Near the middle left side of 
the I/P under the left round 
discharge duct

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Air Temperature Sensor - 

Lower Right

Near the middle right side 
of the I/P in front of the 
rectangular discharge duct

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Air Temperature Sensor - 

Upper Left

At the left side of the I/P 
dash panel

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Air Temperature Sensor - 

Upper Right

At the right side of the I/P 
dash panel

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Ambient Air 

Temperature Sensor - 

HVAC

At the right front of the 
vehicle in front of the 
mirror ambient temperature 
sensor to the right of the 
radiator support

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Ambient Air 

Temperature Sensor - 

Mirror

At the right front of the 
vehicle behind the HVAC 
ambient temperature sensor 
to the right of the radiator 
support

Stationary Windows 

Component Views in 

Stationary Windows

Stationary Windows 

Connector End Views 

in Stationary Windows

Ambient Light/Sunload 

Sensor Assembly

Top center of the I/P in the 
defroster deflector panel

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Antenna - Cellular/GPS

On the roof at the left front 
side

Cellular 

Communication 

Component Views in 

Cellular 

Communication

-

Antenna - Radio

On the right front side of 
vehicle

Entertainment 

Component Views in 

Entertainment

-

Audio Amplifier

Under the front floor 
console between the front 
seats

Entertainment 

Component Views in 

Entertainment

Entertainment 

Connector End Views 

in Entertainment

Automatic Transmission 

Fluid Pressure (TFP) 

Manual Valve Position 

Switch

In the automatic 
transmission

Automatic 

Transmission 

Electronic Component 

Views in Automatic 

Transmission - 4L60-E

Automatic 

Transmission Internal 

Connector End Views 

in Automatic 

Transmission - 4L60-E

Automatic Transmission  In the automatic 

Automatic 

Transmission 

Automatic 

Transmission Internal 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wiring Systems (Component List) - Hummer H2

  

Fluid Temperature (TFT) 

Sensor

transmission

Electronic Component 

Views in Automatic 

Transmission - 4L60-E

Connector End Views 

in Automatic 

Transmission - 4L60-E

Auxiliary Power Outlet - 

Front 1

Near the center area of the 
I/P below the vehicle 
communication interface 
module (VCIM)

Power and Grounding 

Component Views

Power and Grounding 

Connector End Views

Auxiliary Power Outlet - 

Front 2

Near the center area of the 
I/P below the vehicle 
communication interface 
module (VCIM)

Power and Grounding 

Component Views

Power and Grounding 

Connector End Views

Auxiliary Power Outlet - 

Rear

In the right rear of the cargo 
area near the right D-pillar

Power and Grounding 

Component Views

Power and Grounding 

Connector End Views

Auxiliary Power Outlet - 

Console

In the rear of the front floor 
console

Power and Grounding 

Component Views

Power and Grounding 

Connector End Views

Backup Lamp - Left

Upper lamp in left tail lamp 
assembly

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Backup Lamp - Right

Upper lamp in right tail 
lamp assembly

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Battery

On the left front side of the 
engine compartment

Engine Electrical 

Component Views in 

Engine Electrical

Engine Electrical 

Connector End Views 

in Engine Electrical

Blower Motor

At the right lower I/P on the 
HVAC assembly

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Blower Motor Control 

Processor

At the bottom right side of 
the HVAC assembly

HVAC Component 

Views in HVAC 

Systems - Automatic

HVAC Connector End 

Views in HVAC 

Systems - Automatic

Body Control Module 

(BCM)

On the top left side of the 
I/P above the fuse block - 
I/P

Body Control System 

Component Views in 

Body Control System

Body Control System 

Connector End Views 

in Body Control System

Brake Fluid Level Switch

On the left side of the brake 
fluid reservoir in the left 
rear of the engine 
compartment

Hydraulic Brakes 

Component Views in 

Hydraulic Brakes

Hydraulic Brakes 

Connector End Views 

in Hydraulic Brakes

Camshaft Position 

(CMP) Sensor

At the top center rear of the 
engine near G104 and the 
engine oil pressure (EOP) 
sensor

Engine Controls 

Component Views in 

Engine Controls - 6.0L

Engine Controls 

Connector End Views 

in Engine Controls - 

6.0L

Cellular Telephone 

Microphone

In the left front headliner 
above the driver

Cellular 

Communication 

Component Views in 

Cellular 

Cellular 

Communication 

Connector End Views 

in Cellular 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wiring Systems (Component List) - Hummer H2

  

Communication

Communication

Center High Mounted 

Rear Stop Lamp 

(CHMSL)

On the center top rear of the 
cab

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Cigar Lighter

At the center of the I/P near 
the accessory outlets

Power and Grounding 

Component Views

Power and Grounding 

Connector End Views

Clearance Lamps - LF

At the top left front of the 
outer roof

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Clearance Lamps - LR

At the top left rear of the 
outer roof

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Clearance Lamps - RF

At the top right front of the 
outer roof

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Clearance Lamps - RR

At the top right rear of the 
outer roof

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Coolant Level Switch, If 

Equipped

Right front of the engine 
compartment on the bottom 
of the coolant reservoir

Cooling System 

Component Views in 

Engine Cooling

Cooling System 

Connector End Views 

in Engine Cooling

Courtesy Lamp - Left B-

Pillar

At the base of the left B-
pillar trim panel

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Courtesy Lamp - Right 

B-Pillar

At the base of the right B-
pillar trim panel

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Courtesy Lamp - Left 

Footwell, If Equipped

Under lower left side of I/P

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Courtesy Lamp - Right 

Footwell, If Equipped

Under lower right side of 
I/P

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Courtesy Lamp - Left 

Front Door

At the left front side door 
trim panel

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Courtesy Lamp - Right 

Front Door

At the right front side door 
trim panel

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Courtesy Lamp - LR 

Door

Below the arm rest attached 
to the trim panel

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

Courtesy Lamp - RR 

Door

Below the arm rest attached 
to the trim panel

Lighting Systems 

Component Views in 

Lighting Systems

Lighting Systems 

Connector End Views 

in Lighting Systems

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wiring Systems (Component List) - Hummer H2