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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1446 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSCOOLANT AIR BLEED PIPE ASSEMBLY REPLACEMENT (5.3L ENGINE)REMOVAL 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: Removing/Installing Coolant Air Bleed Pipe
    GM898841Courtesy of GENERAL MOTORS CORP.
  1. Remove the coolant air bleed pipe bolts (2).
  2. Remove the coolant air bleed pipe (1) with gaskets.
    3. Fig 2: Removing/Installing Coolant Bleed Pipe Covers
    GM898842Courtesy of GENERAL MOTORS CORP.
  3. Remove the coolant air bleed pipe cover bolts (1) and covers (2).
    4. Fig 3: View Of Air Bleed Pipe Sealing Gasket
    GM64262Courtesy of GENERAL MOTORS CORP.
  4. Remove the gaskets from the coolant air bleed pipe and covers.
  5. Discard the gaskets.
    6. Fig 4: Coolant Air Bleed Hose & Pipe
    GM790766Courtesy of GENERAL MOTORS CORP.
  6. Remove the coolant air bleed hose (1) from the pipe (2).
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.