OEM 2010 Buick Lucerne Oil Pump

2010 Buick Lucerne Parts Questions & Experts Answers

• Q: How to replace the oil pump in the 4T65-E automatic transmission on 2010 Buick Lucerne?

  A: Before disassembling the Oil Pump in the 4t65-e automatic transmission, start with removing the case side cover. Then remove the Oil Pump bolts (230, 231) and Oil Pump (200) from the Valve Body (300). Inspect and clean Oil Pump, making sure it is in a good condition. To install, mount the Oil Pump (200) back on the Valve Body (300) and install the Oil Pump bolts (230, 231). Torque the nine (231) m6 x 1.0 x 85 bolts to 12 nm (106 lb in) and the two (230) m6 x 1.0 x 95 bolts to 16 nm (12 lb ft). Experts recommend resetting the transmission adaptive pressure (TAP) values through the scan tool because it will clear all learned values, whereby the Engine Control Module (ECM), powertrain control module (PCM), or transmission control module (TCM) will have to learn all tap values, and this will impact the transmission performance. Lastly, re-cover the side cover of the case.