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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Automatic Transmission - ALLISON - Introduction (2 Of 2)) >> Repair Instructions >> Transmission Fluid Cooler Hose/Pipe Replacement >> Removal Procedure

Removal Procedure

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  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Pull the plastic cap back from the quick connect fitting.
  3. Fig 1: View Of Transmission Oil Cooler Lines
    GM396804Courtesy of GENERAL MOTORS CORP.
  4. Remove the cooling lines from the clips.
  5. Remove the two retaining rings securing the two cooling lines to the transmission.
  6. Fig 2: Bent Tip Screwdriver
    GM104737Courtesy of GENERAL MOTORS CORP.
  7. Use a bent tip screwdriver.
  8. Fig 3: Removing Retaining Ring For The Quick Connect Fitting
    GM104739Courtesy of GENERAL MOTORS CORP.
  9. Pull on the open ends of the retaining ring in order to rotate the retaining ring around the quick connect fitting until the retaining ring is out of the fitting.

    Discard the retaining ring.

  10. Fig 4: Cooler Line & Quick Connect Fitting
    GM104740Courtesy of GENERAL MOTORS CORP.
  11. Pull the cooling line straight out from the quick connect fitting.
  12. Repeat this procedure to remove all the remaining cooling lines from quick connect fittings.
  13. Fig 5: Removing Cooling Lines From Radiator (Without An Auxiliary Cooler)
    GM396802Courtesy of GENERAL MOTORS CORP.
  14. For vehicles without an auxiliary cooler, remove the cooling lines from the radiator.
  15. Fig 6: Removing Cooling Lines From Radiator (With An Auxiliary Cooler)
    GM396806Courtesy of GENERAL MOTORS CORP.
  16. For vehicles with auxiliary cooling, remove the cooling lines from the radiator.
  17. Fig 7: Removing Transmission Cooler Hoses From Cooler
    GM396817Courtesy of GENERAL MOTORS CORP.
  18. Remove the oil cooling lines from the auxiliary oil cooler.