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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1410 (ENGINE CONTROL SYSTEM - 4.2L (INTRODUCTION))REPAIR INSTRUCTIONSAIR CLEANER ASSEMBLY REPLACEMENTREMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Disassembling/Assembling Air Cleaner Housing
    GM1361132Courtesy of GENERAL MOTORS CORP.
  1. Remove the air cleaner cover/resonator (2) then position the air cleaner element (6) and air outlet duct (3) out of the way. Refer to Air Cleaner Element Replacement .
  2. Remove the air inlet duct (5) from the lower air cleaner housing/washer solvent tank assembly (4).
    3. Fig 2: Locating Electrical Connectors
    GM907812Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the following electrical connectors:
    • Windshield washer pump (1)
    • Headlamp washer pump (2), if equipped
    • Low solvent level sensor (4)
    • Lift gate washer pump (6), if equipped
  4. Remove the washer solvent level sensor wire harness from the wire harness retaining clips (3, 5).
    5. Fig 3: Disconnecting/Connecting Headlight Washer Hose
    GM1362808Courtesy of GENERAL MOTORS CORP.
  5. If applicable, disconnect the headlamp washer hose from the headlamp washer pump located on the lower air cleaner housing/washer solvent tank. Cap the headlamp washer pump outlet fitting to prevent loss of washer solvent.
    6. Fig 4: Removing/Installing Air Cleaner Assembly
    GM1361745Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the washer pump hoses (3) and plug the washer pump outlet ports to prevent loss of washer solvent.
  7. Remove the 2 air cleaner housing/washer solvent tank assembly retaining nuts (1) from the mounting studs.
  8. Lift the lower air filter housing/washer solvent tank assembly (2) off of the studs and remove the assembly.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.