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2003 Chevrolet Silverado 2500 HD CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Chevrolet REPAIR SHOPS DON'T WANT YOU TO KNOW

Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!

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Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Chevrolet Silverado 2500 HD car and truck repair procedures including Chevrolet 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 Chevrolet Silverado 2500 HD automobile. Try the Automotix DIY solution today!
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Using the Automotix DIY repair procedures will save you hundreds and even thousands of dollars! In addition, it will save you hours of touring the city searching for Chevrolet mechanics you can trust. The Automotix DIY solution is particularly affordable. A full access to the entire DIY repair procedures and diagrams for your 2003 Chevrolet Silverado 2500 HD vehicle will cost less than a single gallon of gas. Here are some of the DIY repair tips and procedures you will find here:

A/C & HEATER SERVICE PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

Compressor Service -> Denso Compressor -> Clutch & Coil, Replace
Vehicle: 2003 Chevrolet Silverado 2500 HD 6.0 V8 GAS

  • Raise and suitably support vehicle.
  • Remove engine protection shield.
  • Relieve tension by rotating tensioner clockwise and remove drive belt, Fig. .
  • Remove mo...

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BRAKE SERVICE PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

Power Brake Units -> Delco Brake Booster -> Troubleshooting -> Brakes Grab -> Hard Pedal -> Slow Or No Release
Vehicle: 2003 Chevrolet Silverado 2500 HD 6.0 V8 GAS

Hard Pedal

  • Internal vacuum leak.
  • Faulty control valve.
  • Broken or damaged hydraulic brake lines.
  • Collapsed or damaged vacuum hose.
  • Plugged or loose vacuum fitting.
  • Bad stud welds on front or rear housing on power head.
  • Faulty booster diaphragm.
  • Restricted air filter element.
  • Worn or distorted reaction plate or levers.
  • Cracked or broken pow...

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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Pressure Relief -> Except Montana SV6, Relay, Rendezvous w/3.6L Engine, Terraza, Tracker & Uplander -> Engine Fuel Pressure Service Port -> Engines Less Fuel Pressure Service Port
Vehicle: 2003 Chevrolet Silverado 2500 HD 6.0 V8 GAS

Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.

Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental spray of fuel.

After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while the vehicle relearns its adaptive strategy.

Engines Less Fuel Pressure ...

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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
Vehicle: 2003 Chevrolet Silverado 2500 HD 6.0 V8 GAS

Never clamp propeller shaft tubing in a vise. Clamping could dent or deform the tube causing an imbalance or unsafe condition. Always clamp on one of the yokes and support the shaft horizontally. Avoid damaging the slip yoke sealing surface. Nicks may damage the bushing or cut the lip seal.

Disassemble

  • Support propeller shaft in a line horizontal with table of a press.
  • Mark propeller shaft in order to show which end connects to transmission and which end goes to rear axle.
  • On models equipped with external snap ring retainers, proceed as follows:
    • Disassemble snap rings by ...

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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

Alternator, Replace
Vehicle: 2003 Chevrolet Silverado 2500 HD 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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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

Cabin Air Filter Service -> General Motors Corp./Saturn -> 1999-2007 Silverado, Sierra, 2000-07 Denali, Suburban, Tahoe, Yukon, Yukon XL, 2001-07 Escalade & 2002-07 Avalanche
Vehicle: 2003 Chevrolet Silverado 2500 HD 6.6 V8 DIESEL

Under normal operating conditions the cabin air filter should be replaced every 15,000 miles. In dusty areas change the cabin air filter more often.

  • Remove the righthand instrument panel hush panel.
  • Remove the A/C and heater modul...

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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

General Motors Corp./Saturn Trucks -> Service Four Wheel Drive (4WD) System Warning Lamp ->
Vehicle: 2003 Chevrolet Silverado 2500 HD 6.6 V8 DIESEL

This lamp should light for approximately 6-8 seconds when the ignition is turned On as a bulb check. If the ...

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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

Radiator, Replace
Vehicle: 2003 Chevrolet Silverado 2500 HD 8.1 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 eng...

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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

Serpentine Drive Belt, Replace
Vehicle: 2003 Chevrolet Silverado 2500 HD 6.6 V8 DIESEL

  • Rotate tensioner to release belt tension using a 1/2 inch breaker bar with a 5/8 inch socket placed on tensioner pulley, then remove belt.
  • Route be...

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COMPONENT LOCATION DIAGRAMS FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

Component location diagrams for most 2003 Chevrolet Silverado 2500 HD cars and light trucks sold in the U.S. from 1990+.

Left Hand Lower Dash Diagram for 2003 Chevrolet Silverado 2500 HD  8.1 V8 GASLeft Hand Lower Dash Diagram for 2003 Chevrolet Silverado 2500 HD 8.1 V8 GAS

Components on diagram:
  • Courtesy Lamp Connector
  • Splice Pack SP-205
  • Body Control Module Connector
  • Data Link Connector
  • Fuse Block
  • Throttle Actuator Control Module Diagram for 2003 Chevrolet Silverado 2500 HD  8.1 V8 GASThrottle Actuator Control Module Diagram for 2003 Chevrolet Silverado 2500 HD 8.1 V8 GAS

    Components on diagram:
  • Throttle Actuator Control Module
  • Junction Block Underhood
  • Throttle Actuator Control Connector
  • CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Silverado 2500 HD PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

    OEM drawn wiring diagrams for most 2003 Chevrolet Silverado 2500 HD cars and light trucks sold in the U.S.

    2003 Chevrolet Silverado 2500 HD  6.0 V8 CNG Wiring Diagram2003 Chevrolet Silverado 2500 HD 6.0 V8 CNG Wiring Diagram

    Components on diagram:
  • Horn Relay
  • Body Control Module
  • Horn
  • Horn Switch
  • 2003 Chevrolet Silverado 2500 HD  6.6 V8 DIESEL Wiring Diagram2003 Chevrolet Silverado 2500 HD 6.6 V8 DIESEL Wiring Diagram

    Components on diagram:
  • Body Control Module
  • Rear Door Unlock Relay
  • CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Silverado 2500 HD WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

    OEM TSB listings for most 2003 Chevrolet Silverado 2500 HD cars and light trucks sold in the U.S. from 1985+.

    Document: 6.6L LB7, LLY Duramax Diesel Engine Cylinder Head Gasket Missing Thickness Grade Markings-Inspect Block for Stampings
    Vehicle: 2003 Chevrolet Silverado 2500 HD 6.6 V8 DIESEL

    Auto Systems:
  • Diesel Engines
  • Document: Revised General Motors New Vehicle Tire Warranty Program
    Vehicle: 2003 Chevrolet Silverado 2500 HD 6.0 V8 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Wheels, Tires, Wheel Bearings, Seals, Hubs
  • CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Silverado 2500 HD TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR 2003 Chevrolet Silverado 2500 HD AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Chevrolet Silverado 2500 HD 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 Chevrolet Silverado 2500 HD 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 Chevrolet Silverado 2500 HD 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 Chevrolet Silverado 2500 HD 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

    CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Silverado 2500 HD SPECIFICATIONS DATA!

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

    Click here to view more details2006 Chevrolet Silverado 2500 HD Door Handle, Front, Passenger Side, With keyhole; A high quality, OE replacement door handle; With 1-year limited Matheny warranty..

    Source: Auto Body Parts Store

    $17.48

    Click here to view more details about 2010 Chevrolet Silverado 2500 HD Vent Visor2010 Chevrolet Silverado 2500 HD Vent Visor, Made from high impact acrylic; Features original Ventvisor design; Keeps rain out and lets fresh air enter your vehicle; Helps reduce heat build-up in cab by letting the window be partially open; Easy no-drill installation using 3M adhesive foam tape..

    Source: Auto Body Parts Store

    $38.36

    Click here to view more details2013 Chevrolet Pickup Silverado Driver Side Head Light Assembly, Driver Side Head Light Assembly, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $104.50

    Click here to view more details1993 Jeep Cherokee L4, 2.5 L, 150 CID Rebuilt Engine, Block #532, 403, Head #403, 117 Crank #904, Crank snout 2.125", Oil bypass in filter, not in block, FI only, Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $1,297.00

    Click here to view more details2001 Chevrolet Silverado 2500 HD Used Parking Lamp, Passenger Side, PLP/TURN SIGNAL, 15199559, Very Good.

    Source: Used Auto Parts Store

    $86.00

    Click here to view more details2010 Chevrolet Silverado 2500 HD Used Rear Drive Shaft, 4x4, 143.5 WB (ext cab), trans (opt MYD), Very Good.

    Source: Used Auto Parts Store

    $248.00
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