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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:
  • Transfer Case Shift Control Module
  • Data Link Connector
  • Transfer Case
  • Transfer Case Shift Control Switch
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Data Link Connector
  • Powertrain Control Module
  • Malfunction Indicator Lamp
  • 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:
  • 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:
  • Data Link Connector
  • Throttle Actuator Control Module
  • Powertrain Control 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:
  • Data Link Connector
  • Body Control Module
  • Audio Amplifier
  • Inflatable Restraint Steering Wheel Module Coil
  • Rear Seat Audio Controller
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Garage Door Opener
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Data Link Connector
  • Battery Positive Voltage
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Data Link Connector
  • Cigar Lighter
  • Auxiliary Power Outlet-Console
  • 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 details about 2009 Hummer H2 Antenna2009 Hummer H2 Antenna, 4-section mast; 1200 mm cable; With top and side key; A high quality universal fender mount antenna; May require modification or other adjustment to your vehicle upon installation; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $5.62

    Click here to view more details about 2009 Hummer H2 Antenna2009 Hummer H2 Antenna, 1-section mast; 470 mm extension; Stick-on; A high quality universal imitation antenna; May require modification or other adjustment to your vehicle upon installation..

    Source: Auto Body Parts Store

    $5.01

    Click here to view more details about 2007 Hummer H2 17" x 8.5" Alloy Wheel2007 Hummer H2 17" x 8.5" Alloy Wheel, Alloy Wheel; 17 X 8.5; 7 Spokes; 8 Lug; 6.5 Inch BP; Silver, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $117.50

    Click here to view more details2005 Hummer H2 V8, 6.0 L, 368 CID Rebuilt Engine, 6.0 V-8 Aluminum Heads, Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $2,099.00

    Click here to view more details2003 Hummer H2 Used A/C Compressor, 5.3, AUTO, 4X4, Very Good.

    Source: Used Auto Parts Store

    $118.00

    Click here to view more details2008 Hummer H2 Used Ignition Switch W/Key, W/KEY, Very Good.

    Source: Used Auto Parts Store

    $65.00
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