If you’re dealing with frustrating engine problems in your 2010-2011 Buick LaCrosse—like erratic idling, sudden stalling, or a persistent Check Engine Light that just won’t go away—you’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Engine Control Module (ECM) can turn a reliable vehicle into a source of constant headaches. This isn’t just a component; it’s the brain of your engine, and when it falters, the entire system suffers.
This isn’t just a replacement part; it’s a complete solution. We provide a high-quality ECM, part number 19300014, that is professionally flashed with the latest official GM software releases. To ensure a perfect match, we program it specifically to your vehicle’s unique Vehicle Identification Number (VIN) before it ever leaves our facility. This critical step ensures all systems communicate correctly, restoring the performance and reliability you expect from your car.
From the Diagnostic Bay: A LaCrosse That Wouldn’t Cooperate
I remember a 2011 LaCrosse 3.6L that came into my shop with a truly baffling issue. The owner complained of intermittent no-starts and occasional stalling at red lights. No codes were stored initially. We checked the battery, alternator, and fuel pressure—all perfect. The problem was so random we couldn’t replicate it for two days. Finally, on a test drive, the dash went blank for a second and the engine sputtered. A U0100 (Lost Communication With ECM/PCM) code finally appeared. It turned out the ECM’s main processor was failing under thermal stress. Replacing it with a properly programmed unit like this one solved the problem for good. These intermittent issues are classic signs of an ECM on its way out.
Is Your LaCrosse Exhibiting These ECM Failure Signs?
A faulty ECM can manifest in numerous ways. If you’re noticing any of the following, it’s a strong indicator that your engine’s computer may be the culprit:
- âś” Unexplained Check Engine Light illumination
- âś” Stored diagnostic trouble codes (DTCs) like P0601, P0606, or U0100
- âś” Vehicle refuses to start or has intermittent starting issues
- âś” Poor engine performance, hesitation, or misfires
- âś” Noticeable decrease in fuel economy
- âś” Harsh or incorrect automatic transmission shifting
- âś” Communication problems with diagnostic scan tools
A Straightforward Guide to Installation
Installing your new 2010-2011 LaCrosse ECM is a manageable job for a DIY enthusiast. Follow these steps carefully for a successful replacement.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
- Locate the ECM: On the 2010-2011 LaCrosse, the ECM is found in the engine compartment on the driver’s side (LH side).
- Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harnesses from the old ECM. Inspect the connectors 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: Mount your new, pre-programmed ECM in place and tighten the bolts securely.
- Reconnect and Secure: Plug the wiring harnesses back into the new module, ensuring they click into place. Reconnect the negative battery terminal.
- Immobilizer Security Sync: For LaCrosse and Camaro models, we make this process plug-and-play. By sending us your original module, we transfer the immobilizer security data to the new unit. This means once installed, the vehicle will start and run without requiring any additional security relearn procedures. We will contact you with instructions for this simple process after your purchase.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a range of GM vehicles equipped with the 3.6L V6 engine, ensuring broad compatibility. It is guaranteed to fit the following models and configurations:
- âś” 2010-2011 Buick LaCrosse (Electronic Control Module; LH engine compartment, 3.6L)
- âś” 2010 Buick Allure (Electronic Control Module; LH engine compartment, 3.6L)
- âś” 2010-2011 Cadillac CTS (Electronic Control Module; RH front engine compartment, 3.6L)
- âś” 2010-2011 Cadillac STS (Electronic Control Module; RH engine, 3.6L)
- âś” 2010-2011 Chevrolet Camaro (Electronic Control Module; 3.6L)
- âś” 2010-2011 Chevrolet Traverse (Electronic Control Module; behind fan shroud)
- âś” 2010-2011 GMC Acadia (Electronic Control Module; behind fan shroud)
- âś” 2010-2011 Buick Enclave (Electronic Control Module; behind fan shroud)
- âś” 2010 Saturn Outlook (Electronic Control Module; behind fan shroud)
This unit replaces part numbers: 19300015, 19300014, 12617230, 12636355, 12635019.