2003 Chevrolet Trailblazer REPAIR MANUAL -- HOW TO FIX YOUR CAR OR TRUCK

Auto Parts Search


2003 Chevrolet Trailblazer 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!

Help me findSearch

Select Section

Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Chevrolet Trailblazer 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 Trailblazer automobile. Try the Automotix DIY solution today!
DIY REPAIR SAMPLES > CONTINUE EXPLORING >
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 Trailblazer 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 Trailblazer AUTOMOBILES

Automatic Temperature Control Systems Diagnosis & Testing -> Bravada, Envoy, Rainier & Trailblazer -> Diagnosis & Testing -> Accessing Diagnostic Trouble Codes -> Clearing Diagnostic Trouble Codes -> Diagnostic Tests -> Diagnostic Trouble Code Interpretation -> System Performance Test
Vehicle: 2003 Chevrolet Trailblazer 4.2 L6 GAS

Accessing Diagnostic Trouble Codes

Connect a suitably programmed scan tool to Data Link Connector (DLC) and follow manufacturer's instructions.

Diagnostic Trouble Code Interpretation

Refer toFig. , for Diagnostic Trouble Code (DTC) identification and desc...

[[table data]]

CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer A/C & HEATER SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 2003 Chevrolet Trailblazer AUTOMOBILES

Hydraulic Brake Systems -> Brake System Bleed -> Hydraulic System Flush -> Manual Bleed -> Master Cylinder Bleed -> Parking Brake Bleed -> Pressure Bleed
Vehicle: 2003 Chevrolet Trailblazer EXT 5.3 V8 GAS

Manual Bleed

  • If vehicle is equipped with power brakes, remove vacuum reserve by applying brakes several times with engine off.
  • Fill master cylinder reservoirs with suitable brake fluid.. Ensure to always keep master cylinder reservoirs at least half full during entire bleeding procedure.
  • If master cylinder is suspected to have air in the bore, it must be bled first. To bleed master cylinder, proceed as follows:
    • Disconnect forward brake pipe connection at master cylinder.
    • Allow brake fluid to fill master cylinder bore until it begins to flow from forward pipe connector port.
    • Connect...

CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer BRAKE SERVICE PROCEDURES

FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Chevrolet Trailblazer AUTOMOBILES

General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Filter Replacement -> Gasoline Engines Except Equinox, Montana SV6, Relay, Rendezvous w/3.6L Engine, Terraza, Uplander & Vue (2004-06) & 2004-06 Envoy, Rainier & TrailBlazer -> Returnless Fuel System
Vehicle: 2003 Chevrolet Trailblazer EXT 5.3 V8 GAS

Returnless Fuel System

On models equipped with fuel injected engines, relieve fuel system pressure as outlined under "Fuel System Pressure Relief."

On models equipped with metal collar quick disconnect connectors, GM tool No. J37088-A, or equivalent, will be required to disconnect the connector. Pri...

CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer FUEL FILTER REPLACEMENT PROCEDURES

DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Chevrolet Trailblazer AUTOMOBILES

DRIVESHAFT, Replace -> Front -> One Piece Driveshaft -> Rear -> Two Piece Driveshaft
Vehicle: 2003 Chevrolet Trailblazer EXT 4.2 L6 GAS

Front

  • Raise and support vehicle.
  • Mark the front U-joint to the pinion yoke on the front differential.
  • Mark the relationship of the rear U-joint to the transfer case drive flange.
  • Remove the retaining nuts and bolts from the drive flange.
  • Remove the clamps and retaining bolts from the front drive axle pinion flange.
  • Remove the front propeller shaft from the vehicle.
  • Using tape and or a rubber band, wrap the front U-joint bearing caps to ensure the caps do not separate from the U-joint.
  • Reverse procedure to install, noting the following:
    • Torque front propeller shaft to the pinion flang...

CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES

STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Chevrolet Trailblazer AUTOMOBILES

Starter, Replace
Vehicle: 2003 Chevrolet Trailblazer 4.2 L6 GAS

Upon removal of starter, note if any shims are used. If shims are used, they should be installed in their original locations. After installation, if starter is noisy during cranking, remove one .015 inch double shim or add one .015 inch single shim to the outer bolt. If starter makes a high pitched whine after firing, add .015 inch double shims until noise ceases.

  • Disconnect battery ground cable.
  • Raise and...

CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer STARTER & ALTERNATOR REPLACEMENT PROCEDURES

MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Chevrolet Trailblazer AUTOMOBILES

General Motors Corp./Saturn Trucks -> Check Engine Oil Level ->
Vehicle: 2003 Chevrolet Trailblazer EXT 5.3 V8 GAS

This system is used to indicate a low engine oil level condition. The lamp should light during engine starting. If oil level is sufficient, the lamp should go off when engine is operating. If oil level is low the...

CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer MAINTENANCE LAMP RESET PROCEDURES

RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Chevrolet Trailblazer AUTOMOBILES

Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2003 Chevrolet Trailblazer 4.2 L6 GAS

Inlet

  • Drain cooling system into a suitable container.
  • Reposition heater core inlet hose clamp at engine.
  • Remove hose from engine.
  • Reposition heater hose inlet clamp at heater core.
  • Remove heater inlet hose from heater core.
  • Remove hose from vehicle.
  • Reverse procedure to install.

Outlet

  • Drain coolin...

CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer RADIATOR & HOSE REPLACEMENT PROCEDURES

SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Chevrolet Trailblazer AUTOMOBILES

Serpentine Drive Belt, Replace
Vehicle: 2003 Chevrolet Trailblazer EXT 4.2 L6 GAS

  • Rotate or lift the belt tensioner arm, using a suitable tool to relieve tension from drive belt.
  • Remove t...

CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer SERPENTINE BELT SERVICE PROCEDURES

COMPONENT LOCATION DIAGRAMS FOR 2003 Chevrolet Trailblazer AUTOMOBILES

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

Liftgate     Diagram for 2003 Chevrolet Trailblazer  4.2 L6 GASLiftgate Diagram for 2003 Chevrolet Trailblazer 4.2 L6 GAS

Components on diagram:
  • Liftgate Module
  • Power Door Lock Connector
  • License Plate Lamp Connector
  • Key Cylinder Connector
  • Liftglass Ajar Connector
  • Windshield Washer Fluid Reservoir Diagram for 2003 Chevrolet Trailblazer EXT 5.3 V8 GASWindshield Washer Fluid Reservoir Diagram for 2003 Chevrolet Trailblazer EXT 5.3 V8 GAS

    Components on diagram:
  • Windshield Washer Fluid Level Switch
  • Air Cleaner Housing
  • Windshield Washer Fluid Pump
  • Headlamp Washer Fluid Pump
  • CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 2003 Chevrolet Trailblazer AUTOMOBILES

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

    2003 Chevrolet Trailblazer  4.2 L6 GAS Wiring Diagram2003 Chevrolet Trailblazer 4.2 L6 GAS Wiring Diagram

    Components on diagram:
  • 1-2 Shift Solenoid Valve
  • Torque Converter Clutch Solenoid Valve
  • Powertrain Control Module
  • Automatic Transmission
  • Automatic Transmission Fluid Temperature Sensor
  • 2003 Chevrolet Trailblazer EXT 5.3 V8 GAS Wiring Diagram2003 Chevrolet Trailblazer EXT 5.3 V8 GAS Wiring Diagram

    Components on diagram:
  • Transfer Case Shift Control Module
  • Data Link Connector
  • Body Control Module
  • Electronic Brake Control Module
  • Powertrain Control Module
  • CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Trailblazer WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 2003 Chevrolet Trailblazer AUTOMOBILES

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

    Document: Engine Rattle Noise after R And R of the Crankshaft Balancer -Inspect Bolt Torque
    Vehicle: 2003 Chevrolet Trailblazer 4.2 L6 GAS

    Symptoms:
  • Noise
  • Auto Systems:
  • Gasoline Engines
  • Document: Revised General Motors New Vehicle Tire Warranty Program
    Vehicle: 2003 Chevrolet Trailblazer 4.2 L6 GAS

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

    COMPONENT/PARTS SPECIFICATIONS FOR 2003 Chevrolet Trailblazer AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Chevrolet Trailblazer 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 Trailblazer 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 Trailblazer 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 Trailblazer 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 Trailblazer SPECIFICATIONS DATA!

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

    More parts
    Help me findSearch
    Auto Repair Quick Search
    Help me find
    Search DIY repair manuals by VIN...
    Vehicle Identification Number is a unique serial number used by the automotive industry to identify individual motor vehicles

    Find out what info we have for your vehicle

    Get the Complete Technical Service Bulletins!
    Get the Complete Technical Service Bulletins!Access diagrams and repair information such as wiring diagrams, diagnosis and repair charts, manufacturer service bulletins, and OEM Part numbers of your 2003 Chevrolet Trailblazer vehicle.
    Access the Complete guide!
    Need To Fix Your Car or Truck?
    Save Money With Free Car Insurance Quote
    FREE car insurance quote
    Enter Zip Code:
    Auto Repair Quick Search
    Help me find