GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  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. Object Number: 396804  Size: SH
  4. Remove the cooling lines from the clips.
  5. Remove the two retaining rings securing the two cooling lines to the transmission.

  6. Object Number: 104737  Size: SH
  7. Use a bent tip screwdriver.

  8. Object Number: 104739  Size: SH
  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.
  10. Discard the retaining ring.


    Object Number: 104740  Size: SH
  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. Object Number: 396817  Size: SH
  14. If equipped, remove the oil cooling lines from the auxiliary oil cooler.
  15. Remove the oil cooling lines from the vehicle.

Installation Procedure

  1. Install the transmission oil cooler lines to the vehicle.
  2. Important: 

       • Do not reuse any of the existing oil lines or oil line fittings if there is excessive corrosion.
       • Do not reuse any of the existing retaining rings that were removed from the existing quick connect fittings. All retaining rings being installed must be new.
       • Ensure the following procedures are performed when installing the new retaining rings onto the fittings.

  3. Install a NEW retaining ring (E-clip) into the quick connect fitting using the following procedure:

  4. Object Number: 104743  Size: SH
  5. Hook one of the open ends of the retaining ring in one of the slots in the quick connect fitting.

  6. Object Number: 104746  Size: SH
  7. Rotate the retaining ring around the fitting until the retaining ring is positioned with all three ears through the three slots on the fitting.

  8. Object Number: 104741  Size: SH
  9. Do not install the new retaining ring onto the fitting by pushing the retaining ring.

  10. Object Number: 104664  Size: SH
  11. Ensure that the three retaining ring ears are seen from inside the fitting and that the retaining ring moves freely in the fitting slots.
  12. Install the NEW retaining ring (E-clip) into the remaining quick connect fittings.

  13. Object Number: 104752  Size: SH
  14. Install the cooler line into the quick connect fitting.
  15. Insert the cooler line end into the quick connect fitting until a click is either heard or felt.

  16. Object Number: 104750  Size: SH
  17. Do not use the plastic cap on the cooler line in order to install the cooler line into the fitting.
  18. Pull back sharply on the cooler line in order to ensure that the cooler line is fastened into the quick connect fitting.

  19. Object Number: 104753  Size: SH
  20. Position (snap) the plastic cap onto the fitting. Do not manually depress the retaining ring when installing the plastic cap onto the quick connect fitting.
  21. Ensure that the plastic cap is fully seated against the fitting.

  22. Object Number: 104754  Size: SH
  23. Ensure that no gap is present between the cap and the fitting.

  24. Object Number: 104753  Size: SH
  25. Ensure that the yellow identification band on the tube is hidden within the quick connect fitting. A hidden yellow identification band indicates proper joint seating.

  26. Object Number: 104755  Size: SH
  27. Do not install the cooler line end into the fitting incorrectly.
  28. If you cannot position the plastic cap against the fitting, remove the retaining ring from the quick connect fitting. Check the retaining ring and the tube end in order to ensure neither is bent. Replace the cooler line or the retaining ring if necessary, and reinstall the cooler line per the installation procedure.

  29. Object Number: 396804  Size: SH
  30. Install the cooling lines to the transmission.
  31. If equipped, install the oil cooling lines to the auxiliary oil cooler.
  32. Install the cooling lines to the clips.
  33. Ensure all of the protective plastic caps are positioned over all of the quick connect fittings.
  34. Lower the vehicle.
  35. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to Transmission Fluid Check .