OEM 2009 Buick Lucerne Oil Pump

2009 Buick Lucerne Oil Pump Parts and Q&A

• Q: How to replace the oil pump in the 4T65-E automatic transmission on 2009 Buick Lucerne?

  A: The replacement process of the Oil Pump in a 4t65-e automatic transmission begins with case side cover removal. Strategically remove Oil Pump bolts (230, 231) subsequent to their removal of the Oil Pump (200) from Valve Body (300). You should thoroughly inspect then clean the Oil Pump before reinstalling it. Install the Oil Pump (200) onto the Valve Body (300) afterward mount the Oil Pump bolts (230, 231). Install nine (231) m6 x 1.0 x 85 bolts by applying 12 nm (106 lb in) torque and two (230) m6 x 1.0 x 95 bolts should get 16 nm (12 lb ft). The process of resetting transmission adaptive pressure (TAP) values through the use of a scan tool will delete every learned value in all cells yet Engine Control Module (ECM), powertrain control module (PCM), or transmission control module (TCM) must relearn these tap values which could impact transmission performance. As the last step replace the case side cover.