Hummer H2. Manual - part 999

Component 

Location 

Air Suspension Module 

Near right front of compressor. See Fig. 

37 . 

Blower Motor Control Processor 

Behind right side of dash, on HVAC 

assembly. See Fig. 34 . 

Body Control Module (BCM) 

On top left side of dash, above I/P fuse 

block. See Fig. 16 . 

Driver Door Module (DDM) 

In driver's door, part of switch assembly. 

See Fig. 72 . 

Electronic Brake Control Module (ECBM) 

On left side of inner frame. See Fig. 45 . 

FLASHER MODULE 

On back side of I/P fuse block. See Fig. 

29 . 

Heated Seat Control Module-LR 

Under left side of 2nd row seat. See Fig. 

87 . 

Heated Seat Control Module-RR 

Under right side of 2nd row seat. See Fig. 

87 . 

HVAC Control Module 

Behind center of dash. See Fig. 34 . 

HVAC Module 

On HVAC assembly. See Fig. 34 . 

Inflatable Restraint I/P Module 

Behind right side of dash. See Fig. 62 . 

Inflatable Restraint I/P Module Connector 

Behind right side of dash. See Fig. 61 . 

Inflatable Restraint Sensing & Diagnostic 
Module (SDM) 

Under left front seat. See Fig. 61 . 

Inflatable Restraint Sensing & Diagnostic 
Module (SDM) Connector 

Under left front seat. See Fig. 19 . 

Inflatable Restraint Steering Wheel Module 

Under horn pad. See Fig. 61 . 

Memory Seat Module (Driver) 

Under driver seat. See Fig. 84 . 

Passenger Door Module (PDM) 

In passenger door. See Fig. 73 . 

Powertrain Control Module (PCM) 

On left front of engine compartment. See 

Fig. 52 . 

Rear Window Wiper Module - W/Motor 

At center of liftgate. See Fig. 76 . 

RSA Controller 

At rear of center console. See Fig. 6 . 

Sunroof Module 

In front of headliner, near front overhead 

console. See Fig. 82 . 

Theft Deterrent Control Module 

In steering column. 

Throttle Actuator Control (TAC) Module 

At left rear of engine compartment. See 

Fig. 52 . 

Transfer Case Shift Control Module 

Behind headlamp switch. See Fig. 9 . 

Vehicle Communication Interface Module 

At center of dash, below HVAC control 

module. See Fig. 66 . 

Windshield Wiper/Washer Module 

Under windshield cowl, between wiper 

arms. See Fig. 88 . 

 

2004 Hummer H2 

2004 GENERAL MOTORS Hummer H2

  

MOTORS 

MOTORS LOCATION 

Component 

Location 

Air Suspension Compressor 

On air suspension assembly. See Fig. 37 . 

Air Suspension Compressor 
Connector 

Near right front of compressor. See Fig. 37 . 

Air Temperature Actuator - Left) 

Attached to lower middle underside of HVAC 

assembly, below evaporator. See Fig. 34 . 

Air Temperature Actuator - Right  At middle top of HVAC assembly, above evaporator. 

See Fig. 34 . 

Blower Motor 

At right lower side of dash, on HVAC assembly. 

Door Window Motor Connector-
LR (RR Similar) 

At door window motor. See Fig. 74 . 

Door Window Motor-LR (RR 
Similar) 

In left rear door. See Fig. 74 . 

Encoder Motor 

At rear of transfer case. See Fig. 41 . 

Fuel Pump & Sender Assembly 

In fuel tank. See Fig. 54 . 

Mode Actuator 

On left side of HVAC assembly. See Fig. 34 . 

Rear Window Wiper Motor 

At center of liftgate. See Fig. 88 . 

Recirculation Actuator 

On top front of HVAC assembly. See Fig. 34 . 

Seat Bolster Motor-Driver 

In driver seat back. See Fig. 60 . 

Seat Bolster Motor-Passenger 

In passenger seat back. See Fig. 86 . 

Seat Front Vertical Motor-Driver 

Under driver seat. See Fig. 84 . 

Seat Front Vertical Motor-Front 
Passenger 

Under front passenger seat. See Fig. 85 . 

Seat Horizontal Motor-Driver 

Under driver seat. See Fig. 84 . 

Seat Horizontal Motor-Front 
Passenger 

Under front passenger seat. See Fig. 85 . 

Seat Lumbar Motor-Driver 

In driver seat back. See Fig. 60 . 

Seat Lumbar Motor-Passenger 

In passenger seat back. See Fig. 86 . 

Seat Rear Vertical Motor-Driver 

Under driver seat. See Fig. 84 . 

Seat Rear Vertical Motor-Front 
Passenger 

Under front passenger seat. See Fig. 85 . 

Seat Recline Motor-Driver 

Under driver seat. See Fig. 84 . 

Seat Recline Motor-Front 
Passenger 

Under front passenger seat. See Fig. 85 . 

Starter Motor 

At lower right side of engine. See Fig. 79 . 

Throttle Actuator Control 
Assembly 

Mounted to throttle body assembly, on top of engine. 

Throttle Actuator Control Motor 

Mounted to throttle body assembly, on top of engine. 

 

2004 Hummer H2 

2004 GENERAL MOTORS Hummer H2

  

SENDING UNITS & SENSORS 

SENDING UNITS & SENSORS LOCATION 

Transfer Case Encoder/Motor 
Connector 

At rear of transfer case assembly. See Fig. 42 . 

Window Motor - Driver 

In driver door. See Fig. 72 . 

Window Motor - Front Passenger 

In front passenger door. See Fig. 73 . 

Windshield Washer Fluid Pump-
Reversible 

In washer fluid reservoir. See Fig. 88 . 

Windshield Wiper Motor 

At center rear of engine compartment. See Fig. 88 . 

Component 

Location 

A/C Refrigerant Pressure Sensor 

In rear of A/C compressor. 

Air Suspension Pressure Sensor 

At right side of compressor head. See Fig. 37 . 

Air Suspension Sensor - LR 

At left rear frame rail, attached to top of frame. 

See Fig. 38 . 

Air Suspension Sensor - RR 

At right rear frame rail, attached to top of frame. 

Air Temperature Sensor Connector - 
Lower Left 

On left side of HVAC assembly. See Fig. 34 . 

Air Temperature Sensor Connector - 
Lower Right 

On left side of HVAC assembly. See Fig. 34 . 

Air Temperature Sensor Connector - 
Upper Right 

At right side of dash panel. See Fig. 33 . 

Air Temperature Sensor - Inside 

In left roof rail, forward of "B" pillar. See Fig. 

33 . 

Air Temperature Sensor - Upper Left 

At left side of dash panel. See Fig. 33 . 

Air Temperature Sensor - Upper Right 

At right side of dash panel. See Fig. 33 . 

Ambient Air Temperature Sensor - 
HVAC 

At right front of vehicle, to right of radiator 

support. See Fig. 33 . 

Ambient Air Temperature Sensor - 
Mirror 

At right front of vehicle, to right of radiator 

support. See Fig. 33 . 

Ambient Light/Sunload Sensor 
Assembly 

On top center of dash. See Fig. 33 . 

Ambient Temperature Sensor 
Assembly-Inside 

At middle left side of headliner, above driver's 

seat. See Fig. 65 . 

APP Sensor 

Below left side of dash. See Fig. 48 . 

APP Sensor Connector 

At APP sensor. See Fig. 48 . 

Camshaft Position (CMP) Sensor 
Connector 

At top center rear of engine, near engine oil 

pressure sensor. See Fig. 11 . 

Crankshaft Position (CKP) Sensor 

At lower right rear side of engine block, behind 

starter solenoid. See Fig. 51 . 

 

2004 Hummer H2 

2004 GENERAL MOTORS Hummer H2

  

SOLENOIDS & SOLENOID VALVES

Crankshaft Position (CKP) Sensor 
Connector 

At sensor. See Fig. 79 . 

Engine Coolant Temperature (ECT) 
Sensor 

Near rear of engine block, below exhaust 

manifold. See Fig. 78 . 

Engine Oil Pressure (EOP) Sensor 
Connector 

At left rear of engine. See Fig. 11 . 

Fuel Level Sensor 

At top of fuel tank. See Fig. 81 . 

Fuel Tank Pressure (FTP) Sensor 

On fuel tank, integral to fuel pump & sender 

assembly. See Fig. 54 . 

Heated Oxygen Sensor (HO2S)-Bank 1 
Sensor 1 

In left exhaust pipe, before catalytic converter. 

See Fig. 54 . 

Heated Oxygen Sensor (HO2S)-Bank 1 
Sensor 2 

In left exhaust pipe, after catalytic converter. 

See Fig. 54 . 

Heated Oxygen Sensor (HO2S)-Bank 2 
Sensor 1 

In right exhaust pipe, before catalytic converter. 

See Fig. 54 . 

Heated Oxygen Sensor (HO2S)-Bank 2 
Sensor 2 

In right exhaust pipe, after catalytic converter. 

See Fig. 54 . 

Inflatable Restraint Electronic Frontal 
Sensor (EFS) (2) 

At front left/right of engine compartment. See 

Fig. 63 . 

Inflatable Restraint Front End 
Discriminating Sensor - Left 

On left front of vehicle, by core support. See 

Fig. 61 . 

Inflatable Restraint Front End 
Discriminating Sensor - Right 

On right front of vehicle, by core support. See 

Fig. 62 . 

Intake Air Temperature (IAT)/Mass 
Airflow (MAF) Sensor 

In air induction tube. See Fig. 31 . 

Knock Sensor (KS) 1 

In valley, under intake manifold. See Fig. 55 . 

Knock Sensor (KS) 2 

In valley, under intake manifold. See Fig. 55 . 

Knock Sensor Pigtail 

At top of engine. See Fig. 53 . 

Manifold Absolute Pressure (MAP) 
Sensor 

On top rear of engine, on intake manifold. See 

Fig. 53 . 

Passlock Sensor 

Part of ignition lock cylinder, in steering 

column assembly. See Fig. 47 . 

Vehicle Speed Sensor (VSS) 

On rear of transfer case assembly. See Fig. 42 . 

VSS Sensor 

At rear of transfer case. See Fig. 59 . 

Washer Fluid Level Sensor 

In washer fluid reservoir. See Fig. 88 . 

Wheel Speed Sensor (WSS) - LF (RF 
Similar) 

On front wheel hub assembly. See Fig. 45 . 

Wheel Speed Sensor (WSS) - LR (RR 
Similar) 

On rear wheel hub assembly. See Fig. 45 . 

 

2004 Hummer H2 

2004 GENERAL MOTORS Hummer H2