GM 15213201
Cooler Pipe

To change the auxiliary automatic transmission (AT) oil cooler hose, begin with lifting and supporting the vehicle in such a way that there is enough clearance around the transaxle oil cooler pipes and hoses to avoid damage or wear and possible loss of fluid. Remove the inlet and outlet auxiliary Transmission Oil Cooler lines from the support clip and then detach the inlet auxiliary Transmission Oil Cooler line from transmission and the outlet form lower radiator side tank. Finally, take off both the inlet and outlet auxiliary Transmission Oil Cooler lines from the auxiliary Transmission Oil Cooler. For the installation, connect inlet and outlet auxiliary Transmission Oil Cooler lines to auxiliary Transmission Oil Cooler and secure to the support clip and. Next, connect the outlet auxiliary Transmission Oil Cooler line to the lower radiator side tank as well as the inlet auxiliary Transmission Oil Cooler line to the transmission before lowering the vehicle. Take care not to overfill the transaxle because this might result to foaming, loss of fluid, complaints about shift and possibility of damage to transaxle, and finally raise the fluid level.

Vehicle elevation along with suspension support becomes necessary to complete automatic transmission oil cooler pipes replacement while placing a drainage pan underneath the vehicle. Thoroughly disconnect the transaxle by removing its retaining bracket bolt and detaching the hoses installation. The lower radiator air deflector should first be removed along with disconnecting the oil cooler pipes from their radiator fittings. The process requires pulling back the plastic cap from the fitting by two inches before using a bent-tip screwdriver to rotate and remove the retaining ring. Pull out the oil cooler pipe directly from the fitting after discarding its retaining ring. Recover all oil pipes as well as the clip bolt and retaining ring (E-clip) before removing the pipes from the vehicle. Installation requires new retaining rings exclusively where you should position one ring end into a slot on the quick connect fitting until all three ears sit correctly. The installer must verify that plastic caps cover both oil cooler line ends right before assembly. Push the oil cooler pipe into position until you hear or feel a distinct clicking sound and finish the securement by tugging on it. After inserting the plastic cap onto the fitting avoid manual retaining ring depression to create a proper seal that shows no gaps and conceals the yellow identification band. Replace both the retaining ring and pipe end when the cap fails to sit correctly into position. To finish the repairs first install the transaxle oil cooler hoses on the transaxle and secure the clip bolt with 4 nm (27 inch lbs.) torque and reposition the lower radiator air deflector, lower the vehicle, check fluid levels and examine the maintenance quality and search for leaks.

Secure the engine oil cooler lines back to the vehicle.

Detach the engine oil cooler lines from the engine oil filter adapter, then remove the engine oil cooler line mounting bolt and the engine oil cooler line mounting block.