What procedures must be performed after an Engine Control Module software update or replacement to ensure proper functionality on Buick Regal?

The powertrain shows minimal operational changes after software/calibration updates to the control module which requires the module to relearn multiple control values such as fuel trim corrections and idle air control (IAC) positions and automatic transmission shift adapted values during different driving conditions. A control module replacement requires the performance of crankshaft variation learn procedure along with engine oil life reset procedure, idle learn procedure and inspection/maintenance complete system set procedure and vehicle theft deterrent password learn procedure and Throttle Position Sensor learn procedure to achieve proper system functionality.

How to replace the Engine Control Module (ECM) on Buick Enclave?

The first step to replace the Engine Control Module (ECM) requires turning off the ignition to avoid harm to system components. The scan tool will acquire and document information about the current engine oil life together with automatic transmission fluid life. The first step involves disconnecting the negative Battery Cable followed by removal of the engine wiring harness connectors from both middle and lower locations at the ecm. When dealing with the ecm bracket removal process you should detach the engine wiring harness clip from the ecm bracket tab. Disconnect the engine wiring harness upper electrical connector from ecm by keeping away from the connector pins to stop electrostatic discharge damage. Use your fingers to raise the retaining tab before extracting the ecm from its support brackets. The bracket may need removal when you remove both its bolts and hardware components. Position the ecm bracket properly and then secure the bolts with 6 nm torque until they reach 53 lb in. Insert the ecm onto bracket support tabs before snapping it beneath the retaining tab. Then reconnect the engine wiring harness upper electrical connector and replace the engine wiring harness clip if you changed the ecm bracket. Reconnect the Battery Cable after connecting both the middle and lower electrical connectors to the ecm. New ecms require programming through the reprogramming procedure to operate correctly.

OEM Buick Engine Control Module

Engine Control Computer

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97 Engine Control Modules found

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Buick Knock Sensor Part Number: 12612397
$316.33 MSRP: $658.54
You Save: $342.21 (52%)
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Product Specifications
- Other Name: Module Assembly, Engine Control (W/2ND Mpu); Engine Control Module; ECM; Module, Emission Control System
- Replaces: 12597125
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
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Buick PCM Part Number: 12653998
$393.24 MSRP: $860.80
You Save: $467.56 (55%)
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Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
- Replaces: 12633555
Fits the following Buick Models:
- Enclave | 2013-2016 | Base, Convenience, Leather, Premium | 6 Cyl 3.6 L GAS
- LaCrosse | 2013-2016 | Base, Leather, Premium, Sport Touring, Touring | 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
- Regal | 2013-2017 | Base, GS, Premium, Sport Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
- Verano | 2013-2016 | Base, Convenience, Leather, Premium, Sport Touring, Turbo | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS
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Buick PCM Part Number: 12651994
$463.24 MSRP: $1011.72
You Save: $548.48 (55%)
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Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
- Replaces: 12643248
Fits the following Buick Models:
- Enclave | 2012 | Base | 6 Cyl 3.6 L GAS
- LaCrosse | 2014-2015, 2012 | Base, Convenience, Leather, Premium, Touring | 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.6 L FLEX
- Regal | 2012-2014 | Base, GS, Premium | 4 Cyl 2.0 L FLEX, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
- Verano | 2012-2014 | Base, Convenience, Leather | 4 Cyl 2.4 L FLEX
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Buick ECM Part Number: 12692200
$186.20 MSRP: $377.12
You Save: $190.92 (51%)
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Product Specifications
- Other Name: Module Assembly-Engine Control (W/2ND Mpu) E78 Service ECM 2Byte; Engine Control Module; Module, Emission Control System
- Replaces: 12643636, 12668866, 12668991
Fits the following Buick Models:
- Encore | 2013-2016 | Base, Convenience, Leather, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick PCM Part Number: 12678511
$265.60 MSRP: $538.40
You Save: $272.80 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Assembly-Engine Control (W/2ND Mpu); Engine Control Module; ECM; Module, Emission Control System
- Replaces: 12607096, 12636660
Fits the following Buick Models:
- Enclave | 2008 | CX, CXL | 6 Cyl 3.6 L GAS
- LaCrosse | 2008-2009 | Super | 8 Cyl 5.3 L GAS
- Lucerne | 2006-2008 | CXL, CXS, Super | 8 Cyl 4.6 L GAS
- Rainier | 2007 | CXL | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
- Terraza | 2006-2007 | CX, CXL | 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS
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Buick PCM Part Number: 12600930
$341.34 MSRP: $693.28
You Save: $351.94 (51%)
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Product Specifications
- Other Name: Module Assembly-Powertrain Control (P05 No-Start PCM) (New); Engine Control Module; ECM; Module, Emission Control System
Fits the following Buick Models:
- LaCrosse | 2007-2009 | CX, CXL | 6 Cyl 3.8 L GAS
- Lucerne | 2006-2008 | CX, CXL | 6 Cyl 3.8 L GAS
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Buick ECM Part Number: 12651993
$407.94 MSRP: $887.36
You Save: $479.42 (55%)
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Product Specifications
- Other Name: Module, Engine Control (W/2ND Mpu); Engine Control Module; Module, Emission Control System
- Replaces: 12650256, 12616889, 12642665, 12637106
Fits the following Buick Models:
- LaCrosse | 2010-2011 | CX, CXL | 4 Cyl 2.4 L GAS, 6 Cyl 3.0 L GAS
- Regal | 2011 | CXL | 4 Cyl 2.0 L FLEX, 4 Cyl 2.4 L GAS
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Buick ECM Part Number: 12692201
$175.60 MSRP: $276.36
You Save: $100.76 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Assembly-Engine Control (W/2ND Mpu) E78 Service No-Start; Engine Control Module; Module, Emission Control System
- Replaces: 12668986
Fits the following Buick Models:
- Encore | 2017-2021 | Base, Essence, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick ECM Part Number: 19260507
$683.35 MSRP: $1080.78
You Save: $397.43 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module
Fits the following Buick Models:
- LaCrosse | 2005-2008 | 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 Module Assembly-Engine Control (W/O Calibration) Part Number: 12733825
$127.82 MSRP: $231.33
You Save: $103.51 (45%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: MODULE ASM-ENG CONT (W/O CALN)
Fits the following Buick Models:
- Encore GX | 2025 | Preferred | 3 Cyl 1.2 L FLEX
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Buick Control Module Part Number: 88961137
$72.02 MSRP: $202.43
You Save: $130.41 (65%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Assembly, Powertrain Control (Remanufacture); Engine Control Module; ECM; Module, Emission Control System
- Replaces: 16173278, 16183978
Fits the following Buick Models:
- Skylark | 1993-1995 | Custom, Limited | 4 Cyl 2.3 L GAS
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Buick ECM Part Number: 88999121
$104.15 MSRP: $185.64
You Save: $81.49 (44%)
Product Specifications
- Other Name: Module Assembly, Engine Control (Remanufacture); Engine Control Module; Module, Emission Control System
- Replaces: 1226519, 01226519
Fits the following Buick Models:
- Century | 1984-1985 | Custom, Estate, Estate Wagon, Limited, Olympia Limited, T-Type | 6 Cyl 3.0 L GAS
- Riviera | 1984 | Base, Luxury, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
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Buick PCM Part Number: 19300014
$1151.70 MSRP: $1816.15
You Save: $664.45 (37%)
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
- Replaces: 19300015
Fits the following Buick Models:
- Enclave | 2010-2011 | CX, CXL | 6 Cyl 3.6 L GAS
- LaCrosse | 2010-2011 | CX, CXL, CXS | 6 Cyl 3.6 L GAS
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Buick Control Module Part Number: 88961144
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; PCM; ECM
- Replaces: 16196397
Fits the following Buick Models:
- Regal | 1994-1995 | Custom | 6 Cyl 3.1 L GAS
- Skylark | 1994-1995 | Custom, Gran Sport, Limited | 6 Cyl 3.1 L GAS
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Buick PCM Part Number: 12596679
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
Fits the following Buick Models:
- Rainier | 2006 | CXL | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick PCM Part Number: 19209820
Product Specifications
- Other Name: Module Assembly, Powertrain Control (Refurbished); ECM; Module, Emission Control System
Fits the following Buick Models:
- Rainier | 2006 | CXL | 6 Cyl 4.2 L GAS
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Buick Control Module Part Number: 16183247
Product Specifications
- Other Name: Module, PCM (Remanufactured); Engine Control Module; PCM; ECM; Module, Emission Control System
Fits the following Buick Models:
- LeSabre | 1994-1995 | Custom, Limited | 6 Cyl 3.8 L GAS
- Park Avenue | 1995 | Base, Ultra | 6 Cyl 3.8 L GAS
- Riviera | 1995 | Base | 6 Cyl 3.8 L GAS
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Buick PCM Part Number: 19210067
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
Fits the following Buick Models:
- Rainier | 2007 | CXL | 6 Cyl 4.2 L GAS
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Buick PCM Part Number: 19210071
Product Specifications
- Other Name: Module Assembly, Powertrain Control; Engine Control Module; ECM; Module, Emission Control System
Fits the following Buick Models:
- Rainier | 2005 | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick PCM Part Number: 19300016
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
Fits the following Buick Models:
- Enclave | 2009 | CX, CXL | 6 Cyl 3.6 L GAS

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1-20 of 97 Results

Buick Engine Control Module

Choose OEM Engine Control Module, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with Buick's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM Buick Engine Control Module. You can shop at highly competitive prices and protect your budget. All our genuine Buick parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

The Buick Engine Control Module takes care of the tidiness of the combustion juggling between fuel, air and spark with merciless accuracy. It was in 1903 that Buick won its reputation for quiet cabins and velvet rides and never gave it up. The badge survived wars and fuel crises by simplifying the fundamentals rather than going after gimmicks. The Wildcat EV concept unveiled by Buick in 2022 is an indication of a leap to batteries without foregoing the comfort on the road. Modern designs combine soft suspensions and driver-centric dashboards, noise-dulling glass and user-friendly infotainment in order to make a miserable commute look like a quick run errand. The difference, not the marketing, is noticed by the drivers since the cabin remains silent and the seats cannot pinch the backs of the driver on long journeys. The Engine Control Module monitors oxygen sensors, throttle angle, coolant heat and crank speed and timings injectors and coils to ensure that the cylinders include air at the right time either on mountain passes or city streets. Since the Engine Control Module remaps fuel maps every second, it cuts emissions to SULEV limits, stretches gasoline and yet it offers instant torque. The unit can be learned to accept new parts or driving habits by a mere software reset without opening the hood.

Buick Engine Control Module Parts and Q&A

PCM
12209624
Q: What procedures must be performed after an Engine Control Module software update or replacement to ensure proper functionality on Buick Regal?
A:
The powertrain shows minimal operational changes after software/calibration updates to the control module which requires the module to relearn multiple control values such as fuel trim corrections and idle air control (IAC) positions and automatic transmission shift adapted values during different driving conditions. A control module replacement requires the performance of crankshaft variation learn procedure along with engine oil life reset procedure, idle learn procedure and inspection/maintenance complete system set procedure and vehicle theft deterrent password learn procedure and Throttle Position Sensor learn procedure to achieve proper system functionality.
PCM
19300014
Q: How to replace the Engine Control Module (ECM) on Buick Enclave?
A:
The first step to replace the Engine Control Module (ECM) requires turning off the ignition to avoid harm to system components. The scan tool will acquire and document information about the current engine oil life together with automatic transmission fluid life. The first step involves disconnecting the negative Battery Cable followed by removal of the engine wiring harness connectors from both middle and lower locations at the ecm. When dealing with the ecm bracket removal process you should detach the engine wiring harness clip from the ecm bracket tab. Disconnect the engine wiring harness upper electrical connector from ecm by keeping away from the connector pins to stop electrostatic discharge damage. Use your fingers to raise the retaining tab before extracting the ecm from its support brackets. The bracket may need removal when you remove both its bolts and hardware components. Position the ecm bracket properly and then secure the bolts with 6 nm torque until they reach 53 lb in. Insert the ecm onto bracket support tabs before snapping it beneath the retaining tab. Then reconnect the engine wiring harness upper electrical connector and replace the engine wiring harness clip if you changed the ecm bracket. Reconnect the Battery Cable after connecting both the middle and lower electrical connectors to the ecm. New ecms require programming through the reprogramming procedure to operate correctly.