Restore Your LaCrosse’s Brainpower and Performance
Is your 2010-2011 Buick LaCrosse acting erratically? Experiencing frustrating issues like random stalling, a persistent check engine light, or a complete no-start condition? The problem often points directly to a failing Engine Control Module (ECM), the central computer of your vehicle. When the ECM malfunctions, it can disrupt everything from fuel economy to engine timing, leaving you with an unreliable car. This replacement ECM is your direct, reliable solution, arriving pre-programmed to your vehicle’s specific VIN with the latest GM software updates.
Is Your Vehicle Showing These Symptoms?
- ✔ Check Engine Light is on with no clear cause.
- ✔ Engine stalls, hesitates, or misfires unexpectedly.
- ✔ Vehicle won’t start, but the battery and starter are good.
- ✔ Noticeable drop in fuel efficiency.
- ✔ Transmission shifting feels harsh or erratic.
- ✔ Communication error codes are present (e.g., U0100).
- ✔ Internal module failure codes are stored (e.g., P0601, P0606).
A Technician’s Notebook
I once had a 2011 Cadillac CTS with the 3.6L engine in my bay that was a real head-scratcher. The customer complained of intermittent stalling only when the engine was hot. We checked fuel pressure, sensors, and wiring—everything seemed perfect. No hard codes, just a history of random communication faults. On a hunch, I monitored the ECM’s internal temperature data. Sure enough, as the engine bay heated up, the ECM’s data stream would become erratic right before a stall. A failing internal processor was the culprit. Replacing the ECM, just like this one, solved the problem permanently. It’s a classic example of how a faulty module can create ghost-like symptoms.
The Solution: A Fully Programmed 2010-2011 LaCrosse ECM
Don’t waste time and money at the dealership. We take the hassle out of the replacement process. Simply provide your vehicle’s VIN during checkout, and our technicians will flash this module with the correct, updated software from General Motors. This ensures it communicates perfectly with your car’s other systems right out of the box.
Important Note for LaCrosse & Camaro Owners: For these specific models, your vehicle’s anti-theft (immobilizer) data is stored inside the original ECM. To provide a true plug-and-play solution and avoid additional security relearn procedures, we require you to send us your old module. We will expertly transfer this critical security information to your new ECM. We will contact you with simple instructions after your purchase to make this process seamless.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to ensure all systems are powered down.
- ✔ Locate the ECM: On the 2010-2011 LaCrosse, the ECM is found in the engine compartment on the driver’s side (LH). Refer to your owner’s manual for the exact location on other compatible models.
- ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harness connectors from the old ECM. Inspect the connectors for any corrosion or damage.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed ECM in place and secure the bolts.
- ✔ Reconnect Everything: Plug the wiring harnesses back into the new ECM, ensuring they click securely into place. Reconnect the negative battery terminal.
- ✔ Final Check: Start the vehicle. It may take a moment to initialize. Allow the engine to run for a few minutes. Your check engine light should be off, and the vehicle should run smoothly.
Will This Fit My Vehicle?
This module is a guaranteed fit for the following vehicles equipped with the 3.6L engine. It is a direct replacement for part numbers 19300015, 19300014, 12617230, 12636355, and 12635019.
- 2010-2011 Buick LaCrosse (Electronic Control Module; LH engine compartment)
- 2010-2011 Chevrolet Traverse (Electronic Control Module; behind fan shroud)
- 2010-2011 Cadillac CTS (Electronic Control Module; RH front engine compartment)
- 2010-2011 Chevrolet Camaro (Electronic Control Module)
- 2010 Saturn Outlook (Electronic Control Module; behind fan shroud)
- 2010 Buick Allure (Electronic Control Module; LH engine compartment)
- 2010-2011 Buick Enclave (Electronic Control Module; behind fan shroud)
- 2010-2011 GMC Acadia (Electronic Control Module; behind fan shroud)
- 2010-2011 Cadillac STS (Electronic Control Module; RH engine)
Frequently Asked Questions
Why do you need my VIN?
Your VIN (Vehicle Identification Number) allows us to program the ECM with the exact software and calibrations your specific vehicle requires from the factory. This ensures perfect compatibility and performance without needing a trip to the dealer.
What is the immobilizer transfer for my LaCrosse?
The immobilizer is your car’s anti-theft system. On the LaCrosse and Camaro, its data is tied to the original ECM. By transferring this data from your old unit to the new one, we make the new ECM truly plug-and-play, preventing a no-start condition due to a security lockout.
Is this part difficult to install myself?
For someone with basic mechanical skills, the physical installation is straightforward. It involves disconnecting the battery, unplugging connectors, and swapping the module. Since we handle all the programming, no special electronic tools are needed.
Will this fix my check engine light?
If the check engine light is caused by an internal ECM failure (like codes P0601 or P0606) or ECM-related communication errors, this replacement module is the correct fix. We always recommend a proper diagnosis to confirm the ECM is the root cause before ordering.
What if I have a different part number?
This module is a direct replacement for several part numbers, including 19300014, 12617230, 12636355, and 12635019. As long as your vehicle and engine match the fitment list, this part will work correctly.