Is Your Buick LaCrosse Running Rough? Get the Right Fix, The First Time.
If you’re dealing with a persistent check engine light, unpredictable stalling, poor fuel economy, or a car that just won’t start, a failing Engine Control Module (ECM) is often the culprit. As the brain of your vehicle’s engine, when the ECM falters, it can create a cascade of frustrating and difficult-to-diagnose problems. This isn’t just a part; it’s the central command for your engine’s performance and reliability.
This is a genuine OEM Engine Control Module, part number 12616889, that we program specifically for your vehicle using your VIN. We load the latest, most stable software updates from GM, ensuring all factory-known bugs and performance issues are corrected. This is the definitive solution to get your car running like new again, without the exorbitant costs and scheduling hassles of a dealership visit.
Common Symptoms of a Failing GM ECM:
- ✔ Check Engine Light (CEL) is on with various trouble codes
- ✔ Engine stalling or cutting out while driving
- ✔ No-start or hard-start conditions
- ✔ Noticeable decrease in fuel mileage
- ✔ Rough idling or misfires
- ✔ Transmission shifting issues or harsh shifts
- ✔ Communication errors with scan tools
From the Shop Floor: A Real-World Diagnosis
“A customer’s 2011 LaCrosse came in last week with a persistent P2135 code (Throttle/Pedal Position Sensor/Switch ‘A’/’B’ Voltage Correlation). They had already replaced the throttle body twice at another shop, wasting hundreds of dollars. The real culprit wasn’t the sensor; it was a failed driver circuit inside the original ECM that couldn’t process the throttle signals correctly. Once we installed a correctly programmed module like this one, the code vanished, the car’s throttle response was crisp, and the problem was solved for good. Don’t just replace parts; fix the root cause.”
Why Choose Our Pre-Programmed 2010-2011 LaCrosse Engine Control Module?
When you order from us, you’re not just getting a part in a box. You’re getting a comprehensive solution backed by over 20 years of hands-on diagnostic experience. We understand that your time and money are valuable. That’s why we handle the complex programming for you, making the repair as simple as possible.
Plug-and-Play Installation: No Dealer Visit Required
Your new ECM arrives ready to install. No special tools, no expensive dealer programming, no towing fees. Just follow these simple steps to get back on the road.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On your LaCrosse, the ECM is typically found in the left-hand (driver’s side) of the engine compartment.
- Disconnect Connectors: Carefully unlatch and remove the wiring harness connectors from the old module. Inspect them for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed ECM into place.
- Reconnect Everything: Securely plug the wiring harness connectors into the new module until they click. Reconnect the negative battery terminal.
- Perform Relearn (If Necessary): In many cases, the vehicle is ready to go. Some vehicles may require a simple security or crankshaft position relearn procedure, which can often be initiated without special tools. Your vehicle is now ready to start.
Guaranteed Fitment & Compatibility
This module is a direct replacement for part numbers 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993. It is guaranteed to fit and function correctly on the following vehicles:
- Buick Allure: 2010 (2.4L, 3.0L)
- Buick LaCrosse: 2010-2011 (2.4L), 2010 (3.0L)
- Buick Regal: 2011
- Cadillac CTS: 2010-2012 (3.0L), 2012 (3.6L)
- Cadillac SRX: 2010-2011 (3.0L)
- Chevrolet Camaro: 2012 (3.6L)
- Chevrolet Captiva Sport: 2012
- Chevrolet Equinox: 2010-2011
- Chevrolet Impala: 2012
- Chevrolet Orlando: 2012-2013
- GMC Terrain: 2010-2011
- Saab 9-5: 2010-2011 (2.0L)
IMPORTANT: After purchase, please send us your vehicle’s 17-digit VIN. This is absolutely essential for us to program the module correctly before shipment. Your order cannot be processed without it.