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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1410 (ENGINE CONTROL SYSTEM - 4.2L (INTRODUCTION))REPAIR INSTRUCTIONSSECONDARY AIR INJECTION (AIR) SOLENOID VALVE 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.
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
    2. Fig 1: Disconnecting/Connecting Electrical Connector & Air Outlet Pipe From AIR Solenoid Valve
    GM1297815Courtesy of GENERAL MOTORS CORP.
  2. Disconnect the electrical connector from the secondary air injection (AIR) reaction solenoid valve.
  3. Disconnect the AIR pump air outlet pipe from the AIR solenoid valve.
    4. Fig 2: Removing/Installing AIR Solenoid Valve
    GM1304735Courtesy of GENERAL MOTORS CORP.
  4. Remove the nut (1) securing the transmission fluid level indicator tube (2) to the AIR solenoid valve.
  5. Remove the transmission fluid level indicator tube (2) from the AIR solenoid valve stud (3).
  6. Remove the 2 AIR solenoid valve studs (3).
  7. Remove the AIR solenoid valve (4) and the gasket (5) from the engine.
RENDER: 1.0x

NO RELATED

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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.