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Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Hummer H2 car and truck repair procedures including Hummer engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up & drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix your 2003 Hummer H2 automobile. Try the Automotix DIY solution today!
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WIRING DIAGRAMS FOR 2003 Hummer H2 AUTOMOBILES

OEM drawn wiring diagrams for most 2003 Hummer H2 cars and light trucks sold in the U.S.

2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

Components on diagram:
  • Data Link Connector
  • Air Suspension Module
  • Air Suspension Compressor
  • Ride Height Switch
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Starter Relay
  • Ignition Switch
  • Powertrain Control Module
  • Park/Neutral Position Switch
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Body Control Module
  • Daytime Running Lamp Relay
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Park Lamp Relay
  • Body Control Module
  • Park/Turn Signal Lamp-LF
  • Park/Turn Signal Lamp-RF
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Turn Signal/Hazard Flasher Module
  • Turn Signal/Multifunction Switch
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Turn Signal Lamp-RR
  • Turn Signal Lamp-LR
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Memory Seat Module-Driver
  • Seat Rear Vertical Position Sensor-Driver
  • Seat Rear Vertical Motor-Driver
  • Seat Horizontal Motor-Driver
  • Seat Recline Motor-Driver
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Windshield Washer Fluid Level Switch
  • Battery
  • Headlamp-Right
  • Horn-High
  • Off Road Lamp-Grille Guard
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Inflatable Restraint Steering Wheel Module
  • Inflatable Restraint Steering Wheel Module Coil
  • Inflatable Restraint Front End Discriminating Sensor-Left
  • Steering Wheel Module-High Control
  • Inflatable Restraint Front End Discriminating Sensor-Right
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Data Link Connector
  • Body Control Module
  • Driver Door Module
  • Door Latch Assembly-Passenger
  • Door Latch Assembly-Driver
  • CLICK HERE TO GET FULL ACCESS TO 2003 Hummer H2 WIRING DIAGRAMS!

    Shop online for auto body parts, engines, wheels, lights...

    Click here to view more details2007 Hummer H2 Mirror, Passenger Side.

    Source: Auto Body Parts Store

    $401.70

    Click here to view more details2003 Hummer H2 Neutral Safety Switch, Blade type; 4-prong and 7-prong male terminals; A high quality, direct fit OE replacement neutral safety switch; With 2 years limited Trustbuilt warranty..

    Source: Auto Body Parts Store

    $37.58

    Click here to view more details2007 Hummer H2 Wheel Center Cap, WHEEL CENTER CAP , , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $23.50

    Click here to view more details2005 Hummer H2 V8, 6.0 L, 368 CID Rebuilt Engine, 6.0 V-8 Aluminum Heads, Warranty: 7-Year/70,000 Mile, .

    Source: Rebuilt Engines Store

    $2,099.00

    Click here to view more details2003 Hummer H2 Used Fan Clutch, 5.7, AUTO, 4X4 Classic style, w/trailer equip Z82, Very Good.

    Source: Used Auto Parts Store

    $70.00

    Click here to view more details2003 Hummer H2 Used Air Flow Meter/Sensor, 6.0, AUTO, AWD, Very Good.

    Source: Used Auto Parts Store

    $65.00
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