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Home >> Cadillac >> 2007 >> Escalade RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1363 (Automatic Transmission - 6L80/6L90 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information And Procedures >> Transmission Fluid Cooler Flushing and Flow Test >> Back Flush Procedure

Back Flush Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Transmission Oil Cooler Supply & Return Lines
    GM1762577Courtesy of GENERAL MOTORS CORP.
  1. Connect the J 45096-30:  cooler flush adapter (1) to the vehicle transmission oil cooler supply and return lines at the transmission.
    2. Fig 2: Identifying Black Supply Hose & Clear Waste Hose
    GM1762584Courtesy of GENERAL MOTORS CORP.
  2. Connect the black supply hose (1) to the return line, top connector of the transmission, and the clear waste hose (2) to the feed line, bottom connector of the transmission, to the vehicle cooler lines. This is the reverse flow - backflush direction.
    3. Fig 3: Setting Main Function Switch To FLUSH Position
    GM1212339Courtesy of GENERAL MOTORS CORP.
  3. Turn the main function switch to the FLUSH position. Allow the machine to operate for 30 seconds.
    4. Fig 4: Setting Main Function Switch To IDLE Position
    GM1212341Courtesy of GENERAL MOTORS CORP.
  4. Turn the main function switch to the IDLE position and allow the supply vessel pressure to dissipate.
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