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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:
  • A/C Compressor Clutch Relay
  • A/C Compressor Clutch
  • Powertrain Control Module
  • A/C Low Pressure Switch
  • A/C Refrigerant Pressure Sensor
  • 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
  • Driver Door Module
  • Front Passenger Door Module
  • Rear Door Unlock Relay
  • Rear Door Lock 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:
  • Tail/Stop Lamp-Right
  • Tail/Stop Lamp-Left
  • Marker Lamp-Rr
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Off-Road Lamps Relay 1
  • Off Road Lamps Switch
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Windshield Wiper Motor And Module
  • Washer Fluid Pump-Reversible
  • 2003 Hummer H2  6.0 V8 GAS Wiring Diagram2003 Hummer H2 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Radio
  • Cellular and Navigation Antenna
  • OnStar Button Assembly
  • 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
  • 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 Fender Flares, Front Or Rear2009 Hummer H2 Fender Flares, Front Or Rear, 2.5 in. Wide, Made From Tough And Durable Urethane, Contoured And Paintable To Perfectly Match Your Vehicle's Color, Designed For Use With Factory Rocker Panel Trim Pieces, With Street Scene's Limited Lifetime Warranty.

    Source: Auto Body Parts Store

    $365.36

    Click here to view more details about 2007 Hummer H2 Tail Light2007 Hummer H2 Tail Light, Bulbs included; SAE and DOT compliant to FMVSS-108; Features clear, sturdy top lenses for maximum brightness and specialized heat vents to prevent extreme temperature lens damage; Vacuum tested and 3-point inspected before finished to ensure air-tight lenses and quality; No drilling or modification required; Easy installation; With 1-year IPCW limited warranty..

    Source: Auto Body Parts Store

    $303.73

    Click here to view more details about 2006 Hummer H2 17" X 8.5" Alloy Wheel2006 Hummer H2 17" X 8.5" Alloy Wheel, ALLOY WHEEL, 17 X 8.5, 8 STUDS/LUGS, 6.5" BOLT DIA, 8 SPOKES, POLISHED, UNIVERSAL; MADE BY ALCOA, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $239.45

    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 details2008 Hummer H2 Used Cooling Fan Assembly, FAN ASSM; 7 AND 9 BLADE FANS, Very Good.

    Source: Used Auto Parts Store

    $217.00

    Click here to view more details2009 Hummer H2 Used Engine Computer, Elec Cont Unit (ECU); (lower part of air cleaner box), 3.5L, Very Good.

    Source: Used Auto Parts Store

    $127.00
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