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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1788 (Automatic Transmission - 4L60-E/4L65-E (Diagnosis)) >> Diagnostic Information and Procedures >> Automatic Transmission Oil Cooler Flushing and Flow Test >> Forward Flush

Forward Flush

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Disconnecting Supply & Waste Hoses From Cooler Lines
G02131579Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the supply and waste hoses from the vehicle cooler lines. Reverse the supply and waste hoses to provide a normal flow direction.
    Fig 2: Turning Main Function Switch To FLUSH Position
    G02131580Courtesy of GENERAL MOTORS CORP.
  2. Turn the main function switch to the FLUSH position and allow machine to operate for 30 seconds.
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