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

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.

How to replace the oil pump on Buick Century?

Start replacing the oil pump only after you take off the case side cover. You should disconnect the electrical plugs from the solenoid valves (315A, 315B, 322, 334, and 440) TFP manual switch (395) and temperature sensor (391) using a flat tool. Keep bolt 205 in place and pull out bolts 206 and 207 to get oil pump (200) from valve body (300). Reinstall the oil pump (200) into the valve body (300) and fasten the M6 X 1.0 X 85 bolts (207) at 12 Nm (106 inch lbs.) and M6 X 1.0 X 95 bolts (206) at 16 Nm (12 ft. lbs.). Reattach all electrical connectors to the solenoid valves and control elements including 315A, 315B, 322, 334, and 440 as well as the TFP manual valve position switch (395) and temperature sensor (391). Then put back the case side cover.

How to Service and Repair the Oil Pump on Buick LaCrosse?

Begin by taking out the case side cover to start the Oil Pump replacement process. Disconnect solenoid valves (315A/315B/322/334/440) tfp manual valve position switch (395) and temperature sensor (391) connections using a flat-tooth tool while keeping bolt (205) that binds Oil Pump pieces intact. After unplugging all electrical connectors attach to the Oil Pump you should now remove the Oil Pump bolts (206, 207). Once freed securely pull out the Oil Pump (200) from Valve Body (300). .align the Oil Pump (200) with Valve Body (300) openings before inserting Oil Pump bolts (206, 207). Secure the m6 x 1.0 x 85 bolts (207) to 12 nm torque level and the m6 x 1.0 x 95 bolts (206) to 16 nm torque level. Rejoin electrical wires to the control valves beginning with 440 at solenoid 315a while closing with temperature probe 391 and valve position switch 395.

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Buick Oil Pump
Part Number: 93427692
$128.19 MSRP: $201.71
You Save: $73.52 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump, Oil; Water Pump; Pump Assembly; Pump, Engine Oil Pump
- Replaces: 12555884, 03848907, 3848907, 12555284
Fits the following Buick Models:
- Roadmaster | 1994, 1991-1992 | Base, Estate Wagon, Limited | 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
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Buick Oil Pump
Part Number: 12705142
$127.48 MSRP: $200.53
You Save: $73.05 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
Fits the following Buick Models:
- Encore GX | 2020-2023 | Essence, Preferred, Select | 3 Cyl 1.3 L GAS
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Buick Oil Pump
Part Number: 55514237
$466.14 MSRP: $736.76
You Save: $270.62 (37%)
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Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
Fits the following Buick Models:
- Envision | 2021 | Avenir, Essence, Preferred | 4 Cyl 2.0 L GAS
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Buick Oil Pump
Part Number: 89017753
$138.57 MSRP: $189.71
You Save: $51.14 (27%)
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Product Specifications
- Other Name: Pump, Oil; Oil Pump Repair Kit; Pump, Engine Oil Pump
Fits the following Buick Models:
- Lucerne | 2009-2011 | CX, CXL, CXL Special Edition | 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS
- Terraza | 2006-2007 | CX, CXL | 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS
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Buick Oil Pump
Part Number: 12706965
$140.14 MSRP: $220.51
You Save: $80.37 (37%)
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Product Specifications
- Other Name: Pump, Engine Oil Pump
- Replaces: 12674266, 12688727, 12666334, 12706720, 12666331
Fits the following Buick Models:
- Encore | 2016-2019 | Essence, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Oil Pump
Part Number: 12363188
$55.63 MSRP: $294.68
You Save: $239.05 (82%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
- Replaces: 24571299
Fits the following Buick Models:
- Skylark | 1990-1994 | Base, Custom, Gran Sport, Limited, Luxury Edition | 4 Cyl 2.3 L GAS
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Buick Oil Pump
Part Number: 12518877
Product Specifications
- Other Name: Gear, Engine Oil Pump; Oil Pump Repair Kit; Gerotor Assembly; Pump Kit, Engine Oil Pump
Fits the following Buick Models:
- Century | 1992 | Custom, Limited, Special | 4 Cyl 2.5 L GAS
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Buick Oil Pump
Part Number: 12555384
Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
- Replaces: 03539057, 3539057
Fits the following Buick Models:
- Lucerne | 2006-2011 | CXL, CXS, Super | 8 Cyl 4.6 L GAS
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Buick Oil Pump
Part Number: 90169113
Product Specifications
- Other Name: Pump, Engine Oil; Oil Pump Repair Kit; Pump, Engine Oil Pump
Fits the following Buick Models:
- Skyhawk | 1984-1986 | Custom, Limited, Sport, T-Type | 4 Cyl 1.8 L GAS
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Buick Water Pump
Part Number: 12566029
Product Specifications
- Other Name: Pump, Water; Oil Pump
Fits the following Buick Models:
- LaCrosse | 2005-2007 | CXS | 6 Cyl 3.6 L GAS
- Rendezvous | 2004-2006 | CX, CXL, CXL Plus, Ultra | 6 Cyl 3.6 L GAS
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Buick Oil Pump
Part Number: 22525287
Product Specifications
- Other Name: Pump Assembly; Oil Pump Repair Kit; Pump, Engine Oil Pump
Fits the following Buick Models:
- Electra | 1984-1985 | Estate Wagon | 8 Cyl 5.7 L DIESEL
- LeSabre | 1984-1985 | Collector's Edition, Custom, Estate Wagon, Limited | 8 Cyl 5.7 L DIESEL
- Regal | 1985 | Base | 8 Cyl 5.7 L DIESEL
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Buick Oil Pump
Part Number: 25518783
Product Specifications
- Other Name: Oil Pump Repair Kit
Fits the following Buick Models:
- Somerset Regal | 1985 | Base, Limited | 6 Cyl 3.0 L GAS
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Buick Oil Pump
Part Number: 12337257
Product Specifications
- Other Name: Pump Kit, Oil (Overhaul) (Free Of Asbestos); Oil Pump Repair Kit
Fits the following Buick Models:
- Electra | 1984 | Limited, Park Avenue | 6 Cyl 4.1 L GAS
- LeSabre | 1984-1985 | Collector's Edition, Custom, Limited | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS
- Regal | 1984-1987 | Base, GNX, Grand National, Limited, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS
- Riviera | 1984 | Base, Luxury | 6 Cyl 4.1 L GAS
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Buick Oil Pump
Part Number: 12337253
Product Specifications
- Other Name: Pump Kit, Engine Oil Pump; Oil Pump Repair Kit
Fits the following Buick Models:
- Century | 1984-1985 | Custom, Estate, Estate Wagon, Limited, Olympia Limited, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS
- Electra | 1985 | Limited, Park Avenue, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS
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Buick Oil Pump
Part Number: 22524576
Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
Fits the following Buick Models:
- Riviera | 1984-1985 | Base, Luxury | 8 Cyl 5.0 L GAS
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Buick Oil Pump
Part Number: 10118640
Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
Fits the following Buick Models:
- Regal | 1989-1993 | Custom, Gran Sport, Limited | 6 Cyl 3.1 L GAS
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Buick Oil Pump
Part Number: 22524583
Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
Fits the following Buick Models:
- Electra | 1989, 1984-1987 | Estate Wagon, Limited, Park Avenue | 8 Cyl 5.0 L GAS
- LeSabre | 1984-1990 | Collector's Edition, Custom, Estate Wagon, Limited | 8 Cyl 5.0 L GAS
- Regal | 1986-1987 | Base, Limited | 8 Cyl 5.0 L GAS
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Buick Oil Pump
Part Number: 14086060
Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit; Pump Kit, Engine Oil Pump
Fits the following Buick Models:
- Century | 1993 | Custom, Limited, Special | 4 Cyl 2.2 L GAS
- Skyhawk | 1988-1989, 1984-1986 | Custom, Limited, SE, Sport | 4 Cyl 2.0 L GAS
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Buick Oil Pump
Part Number: 88984189
Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
- Replaces: 10209660
Fits the following Buick Models:
- Century | 1994-1996 | Custom, Limited, Special | 4 Cyl 2.2 L GAS
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Buick Oil Pump
Part Number: 94657310
Product Specifications
- Other Name: Pump, Engine Oil Pump; Oil Pump Repair Kit
Fits the following Buick Models:
- Skyhawk | 1987-1988 | Custom, Limited, SE, Sport, T-Type | 4 Cyl 2.0 L GAS

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Buick Oil Pump Parts Questions & Experts Answers

Oil Pump
89017753
Q: How to replace the oil pump in the 4T65-E automatic transmission on 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.
Water Pump
89060444
Q: How to replace the oil pump on Buick Century?
A: Start replacing the oil pump only after you take off the case side cover. You should disconnect the electrical plugs from the solenoid valves (315A, 315B, 322, 334, and 440) TFP manual switch (395) and temperature sensor (391) using a flat tool. Keep bolt 205 in place and pull out bolts 206 and 207 to get oil pump (200) from valve body (300). Reinstall the oil pump (200) into the valve body (300) and fasten the M6 X 1.0 X 85 bolts (207) at 12 Nm (106 inch lbs.) and M6 X 1.0 X 95 bolts (206) at 16 Nm (12 ft. lbs.). Reattach all electrical connectors to the solenoid valves and control elements including 315A, 315B, 322, 334, and 440 as well as the TFP manual valve position switch (395) and temperature sensor (391). Then put back the case side cover.
Water Pump
12640448
Q: How to Service and Repair the Oil Pump on Buick LaCrosse?
A: Begin by taking out the case side cover to start the Oil Pump replacement process. Disconnect solenoid valves (315A/315B/322/334/440) tfp manual valve position switch (395) and temperature sensor (391) connections using a flat-tooth tool while keeping bolt (205) that binds Oil Pump pieces intact. After unplugging all electrical connectors attach to the Oil Pump you should now remove the Oil Pump bolts (206, 207). Once freed securely pull out the Oil Pump (200) from Valve Body (300). .align the Oil Pump (200) with Valve Body (300) openings before inserting Oil Pump bolts (206, 207). Secure the m6 x 1.0 x 85 bolts (207) to 12 nm torque level and the m6 x 1.0 x 95 bolts (206) to 16 nm torque level. Rejoin electrical wires to the control valves beginning with 440 at solenoid 315a while closing with temperature probe 391 and valve position switch 395.