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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 REPLACEMENTINSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation 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: Removing/Installing Air Cleaner Assembly
    GM1361745Courtesy of GENERAL MOTORS CORP.
  1. Install the lower air filter housing/washer solvent tank assembly (2) onto the mounting studs.
  2. Connect the washer pump hoses (3) to the washer pumps.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the 2 air cleaner housing/washer solvent tank assembly retaining nuts (1) to the mounting studs.

    Tighten:  Tighten the nuts to 15 N.m (11 lb ft).

    4. Fig 2: Disconnecting/Connecting Headlight Washer Hose
    GM1362808Courtesy of GENERAL MOTORS CORP.
  4. If applicable, Connect the headlamp washer hose to the headlamp washer pump located on the lower air cleaner housing/washer solvent tank.
    5. Fig 3: Locating Electrical Connectors
    GM907812Courtesy of GENERAL MOTORS CORP.
  5. Connect 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
  6. Install the washer solvent level sensor wire harness to the wire harness retaining clips (3, 5).
    7. Fig 4: Disassembling/Assembling Air Cleaner Housing
    GM1361132Courtesy of GENERAL MOTORS CORP.
  7. Install the air inlet duct (5) to the lower air cleaner housing/washer solvent tank assembly (4).
  8. Install the air cleaner element (6) and air outlet duct (3) to the lower air cleaner housing/washer solvent tank assembly.
  9. Install the air cleaner cover/resonator (2). Refer to Air Cleaner Element Replacement .
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.