Restore Your Buick’s Brain and Drivability
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 frustration. If your 2010-2011 Buick LaCrosse is suffering from baffling issues like stalling, poor performance, or a persistent check engine light that other repairs haven’t fixed, the problem often lies with the ECM. This isn’t just a part; it’s the central computer responsible for managing everything from fuel mixture and ignition timing to transmission shifts. When it falters, the entire vehicle suffers.
This replacement ECM, part number 19300014, is the definitive solution to get your vehicle running correctly again. We take the guesswork out of the repair by programming the module specifically for your car using your Vehicle Identification Number (VIN). This ensures it arrives with the latest GM software updates, ready to communicate flawlessly with your car’s other systems. For you, this means a more direct path to a reliable repair, eliminating the need for expensive dealership programming appointments.
A Straightforward Guide to Installation
- âś” Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- âś” Locate the ECM: On the 2010-2011 LaCrosse, you’ll find the ECM in the engine compartment on the driver’s side (LH).
- âś” Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- âś” Install the New Module: Bolt the new, pre-programmed ECM into place. Reconnect the electrical harnesses, ensuring they click securely into position.
- âś” Reconnect Power: Reattach the negative battery terminal.
- âś” Special Immobilizer Note: For LaCrosse and Camaro models, a final immobilizer learning procedure is required for a true plug-and-play experience. We will contact you after your purchase with simple instructions on sending us your original module to facilitate this data transfer.
Is Your LaCrosse Showing These Symptoms?
A faulty ECM can manifest in numerous ways. Over the years, I’ve diagnosed hundreds of these failures. Here are the most common signs that point to a bad module:
- âś” Check Engine Light is on with communication codes (like U0100) or internal processor failure codes (P0601, P0606).
- âś” The engine cranks but refuses to start.
- âś” Unexplained stalling or rough idling, especially after the engine warms up.
- âś” A noticeable drop in fuel economy.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Seemingly unrelated warning lights appearing on the dashboard.
Real-World Repair Story
Real-World Repair Story
A customer brought in an ’11 LaCrosse with a 3.6L engine that had the whole shop scratching their heads. The car would intermittently refuse to start, but only when it was hot. There were no consistent trouble codes, just a history of random communication faults. We checked grounds, wiring, and sensors for days. Finally, on a hunch, I monitored the ECM’s internal temperature data on a hot restart attempt. The data stream froze right before the no-start occurred. We swapped in a pre-programmed ECM, and the problem vanished instantly. It was a classic case of thermal failure inside the module—a difficult diagnosis that a simple component replacement solved completely.
Verified Vehicle Compatibility
This module is a direct-fit replacement for several GM vehicles equipped with the 3.6L engine. Please verify your model and year from the list below. This part is a compatible replacement for part numbers: 19300015, 19300014, 12617230, 12636355, and 12635019.
- Buick Allure: 2010 (3.6L)
- Buick Enclave: 2010-2011
- Buick LaCrosse: 2010-2011 (3.6L)
- Cadillac CTS: 2010-2011 (3.6L)
- Cadillac STS: 2010-2011 (3.6L)
- Chevrolet Camaro: 2010-2011 (3.6L)
- Chevrolet Traverse: 2010-2011
- GMC Acadia: 2010-2011
- Saturn Outlook: 2010
Frequently Asked Questions
- What is VIN programming and why is it important?
- VIN programming involves loading your vehicle’s specific software and calibrations onto the ECM. This ensures the module works correctly with your engine, transmission, and options package. We handle this for you before shipping, saving you a trip to the dealer.
- Why do you need my old ECM for a LaCrosse or Camaro?
- These models have specific anti-theft (immobilizer) data stored in the original ECM. To make the new module fully plug-and-play, we need to transfer this security information from your old unit to the new one. We will contact you with instructions after your purchase.
- Is any other programming required after installation?
- In most cases, no. Our pre-programming service handles the critical software. For LaCrosse/Camaro, once we’ve transferred the immobilizer data, it should be ready to go. On some vehicles, a simple Crankshaft Position Sensor relearn may be needed, which can be done with many common scan tools.
- My car is running very poorly. Will this fix it?
- If the poor performance is caused by a failing ECM, this part is the correct solution. However, it’s crucial to ensure other potential issues like bad sensors, fuel delivery problems, or wiring faults have been ruled out. This module fixes the car’s computer, not external mechanical or electrical failures.
- What happens after I place my order?
- After you purchase, you will need to send us your vehicle’s 17-digit VIN. We will then program the module and ship it to you. If you have a LaCrosse or Camaro, we will contact you to coordinate the transfer of your old module’s data.