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2003 Hummer H2 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Hummer REPAIR SHOPS DON'T WANT YOU TO KNOW
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- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
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 Hummer H2 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Hummer H2 AUTOMOBILES
Component Replacement & Adjustment -> Hummer H2 -> Thermostat, Replace
Vehicle: 2003 Hummer H2 6.0 V8 GAS
The thermostat is not serviceable separately. The housing and thermostat must be replaced as an assembly.
- Drain cooling system/engine block into suitable container.
- Loosen clamps at throttle body and at Mass Air Flow (MAF) sensor and remove air cleaner ...
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BRAKE SERVICE PROCEDURES FOR 2003 Hummer H2 AUTOMOBILES
Anti-Lock Brakes -> Bosch 5.3 & 8.0 -> Description
Vehicle: 2003 Hummer H2 6.0 V8 GAS
When wheel slip is detected during a brake application, the ABS enters anti-lock mode. During anti-lock braking, hydraulic pressure in the individual wheel circuits is controlled to prevent any wheel from slipping. A separate hydraulic line and specific solenoid valves are provided for each wheel. The ABS can decrease, hold, or increase hydraulic pressure to each wheel brake. The ABS cannot, however, increase hydraulic pressure above the amount which is transmitted by the master cylinder during braking.
During anti-lock braking, a series of rapid pulsations is felt in the brake pedal...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Hummer H2 AUTOMOBILES
General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Component Locations -> 1999-06 Escalade, Avalanche & Denali, 1988-03 & C/K Pickup (Except 1999-03 Sierra & Silverado), 1992-06 Blazer, Jimmy, Hummer H2, SSR, Suburban, Yukon XL, Tahoe, Yukon, Bravada Gasoline Engines & 2004-06 Rainier, TrailBlazer & Envoy
Vehicle: 2003 Hummer H2 6.0 V8 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Hummer H2 AUTOMOBILES
CV AXLE SHAFT, Replace -> Install -> Remove
Vehicle: 2003 Hummer H2 6.0 V8 GAS
Remove
- Raise and support vehicle.
- Remove wheel and tire assembly.
- Remove drive axle center cap, if equipped.
- Insert a drift or large screwdriver through brake caliper into one of the brake rotor vanes in order to prevent drive axle wheel drive shaft from turning.
- Remove nut and washer from hub. Do not reuse nut. A new nut must be used when installing wheel drive shaft.
- Using axle remover tool No. J 45859 or equivalent, press wheel drive shaft from hub.
- Remove bolts securing wheel drive shaft inboard flange to output shaft flange.
- Remove drift from rotor.
- Remove stabilizer shaft li...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Hummer H2 AUTOMOBILES
Alternator, Replace
Vehicle: 2003 Hummer H2 6.0 V8 GAS
- Disconnect battery ground cable.
- Remove air inlet duct, if required.
- Disconnect terminal plug and battery lead connections from back of alternator.
- Remove upper fan shroud mounting bolts and fan shroud.
- Remove accessory drive belt using suitable 3/8 i...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Hummer H2 AUTOMOBILES
General Motors Corp./Saturn Trucks -> Check Fuel Cap Lamp ->
Vehicle: 2003 Hummer H2 6.0 V8 GAS
The Check Fuel Cap Lamp will illuminate momentarily when the ignition switch is placed in the On position as a bulb check. I...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Hummer H2 AUTOMOBILES
Radiator, Replace
Vehicle: 2003 Hummer H2 6.0 V8 GAS
- Drain radiator coolant into suitable container.
- Remove upper and lower radiator hoses.
- Remove mounting bolts and lower fan shroud.
- Remove engine vent hose and surge take hose.
- Disconnect engine oi...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Hummer H2 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Hummer H2 6.0 V8 GAS
- Rotate tensioner clockwise to release belt tension using suitable wrench, then remove belt.
- Route belt over pulleys excep...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Hummer H2 AUTOMOBILES
Component location diagrams for most 2003 Hummer H2 cars and light trucks sold in the U.S. from 1990+.
 Engine Compartment Components Diagram for 2003 Hummer H2 6.0 V8 GASComponents on diagram: |
 Instrument Panel Diagram for 2003 Hummer H2 6.0 V8 GASComponents on diagram: |
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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 DiagramComponents on diagram: |
 2003 Hummer H2 6.0 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Hummer H2 AUTOMOBILES
OEM TSB listings for most 2003 Hummer H2 cars and light trucks sold in the U.S. from 1985+.
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Document: Revised General Motors New Vehicle Tire Warranty Program Vehicle: 2003 Hummer H2 6.0 V8 GAS Auto Systems: |
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Document: Front or Rear Axle Vent Hose Fluid Leak Vehicle: 2003 Hummer H2 6.0 V8 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Hummer H2 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Hummer H2 cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2003 Hummer H2 cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2003 Hummer H2 cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2003 Hummer H2 cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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