GM Service Manual Online
For 1990-2009 cars only

Transmission Fluid Cooler Hose/Pipe Replacement Body VIN Code 6 LM4

Removal Procedure

  1. Disconnect the transmission cooler lines from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .

  2. Object Number: 871551  Size: SH
  3. Remove the rear sections of the cooler lines from the retainer (2) located on the right side of the engine.
  4. Remove the clip that holds the cooler lines together.
  5. Support the transmission with a transmission jack.
  6. Remove the transmission support. Refer to Transmission Support Replacement .
  7. Remove the front exhaust pipe assembly. Refer to Catalytic Converter Replacement .
  8. Carefully lower the transmission to gain access to the cooler line fittings.
  9. Place a drain pan under the vehicle.
  10. Disconnect the transmission cooler lines from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .

  11. Object Number: 744641  Size: SH
  12. Disconnect the rear oil cooler lines (2) from the front oil cooler lines (1).
  13. Remove the oil cooler lines from the vehicle.

Installation Procedure

  1. Install the transmission oil cooler lines to the vehicle.
  2. Install the transmission cooler lines to the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .

  3. Object Number: 744641  Size: SH
  4. Connect the rear cooler lines (2) to the front cooler lines (1).

  5. Object Number: 871551  Size: SH
  6. Install the cooling line ends (3) to the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  7. Raise the transmission into position.
  8. Install the front exhaust pipe assembly. Refer to Catalytic Converter Replacement .
  9. Install the transmission support. Refer to Transmission Support Replacement .
  10. Remove the transmission jack.
  11. Install the clip that holds the cooler lines together.
  12. Install the cooler lines to the retainer (2) located on the right side of the engine.

  13. Object Number: 871555  Size: SH
  14. Install the front sections of the cooler lines to the vehicle.
  15. Install the cooler lines to the retainer located on the radiator shroud.
  16. Connect the front and rear cooler lines at the quick connect fitting.
  17. Install the cooler lines (4, 5) to the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  18. Remove the drain pan from under the vehicle.
  19. Lower the vehicle.
  20. Fill the transmission to the proper level with DEXRON® VI transmission fluid. Refer to Fluid Capacity Specifications .