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

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 (Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection).




2. Remove the rear sections of the cooler lines from the retainer (2) located on the right side of the engine.
3. Remove the clip that holds the cooler lines together.
4. Support the transmission with a transmission jack.
5. Remove the transmission support. Refer to Transmission Support Replacement ().
6. Remove the front exhaust pipe assembly. Refer to Catalytic Converter Replacement (5.3L Engine) (Service and Repair).
7. Carefully lower the transmission to gain access to the cooler line fittings.
8. Place a drain pan under the vehicle.
9. Disconnect the transmission cooler lines from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection (Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection).




10. Disconnect the rear oil cooler lines (2) from the front oil cooler lines (1).
11. 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 (Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection).




3. Connect the rear cooler lines (2) to the front cooler lines (1).




4. Install the cooling line ends (3) to the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection (Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection).
5. Raise the transmission into position.
6. Install the front exhaust pipe assembly. Refer to Catalytic Converter Replacement (5.3L Engine) (Service and Repair).
7. Install the transmission support. Refer to Transmission Support Replacement ().
8. Remove the transmission jack.
9. Install the clip that holds the cooler lines together.
10. Install the cooler lines to the retainer (2) located on the right side of the engine.




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