If you’re dealing with frustrating engine problems in your 2010-2011 Buick Enclave, you know how quickly it can disrupt your life. A faulty Engine Control Module (ECM) is often the hidden culprit behind issues like random stalling, a persistent check engine light, or a car that simply won’t start. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing ECM can mimic a dozen other problems. This isn’t just a part; it’s the central computer of your engine, and when it’s not working right, nothing else will.
We offer a dependable and straightforward solution. This Engine Control Module is meticulously prepared for your specific vehicle. When you order, you provide us with your Vehicle Identification Number (VIN), and we flash the module with the very latest, most stable software updates directly from GM. This means you receive a component that’s not only a direct replacement but also optimized for performance and reliability, addressing potential issues that were discovered after your vehicle left the factory. This critical programming step is what separates a simple part from a true solution, saving you a costly trip to the dealership for programming.
Is Your Vehicle Showing These Telltale Signs?
- ✔️ The Check Engine Light is on with codes that won’t clear, such as P0601, P0606, or U0100.
- ✔️ Your engine experiences intermittent stalling or hesitation, especially when warm.
- ✔️ Noticeable drop in fuel economy for no apparent reason.
- ✔️ The engine cranks but refuses to start.
- ✔️ Transmission shifting feels harsh or erratic.
- ✔️ Communication errors with other vehicle modules are flagged by a scan tool.
From the Diagnostic Bay: The Intermittent Stall Case
A customer brought in a 2011 Acadia—which uses the same 3.6L powertrain and this exact ECM—with a maddening intermittent stall. It only happened after driving for 30+ minutes in traffic. No codes were stored. We checked fuel pressure, sensors, and wiring harnesses, and everything tested perfectly. On a hunch, I monitored the ECM’s internal temperature data on a long test drive. Just before it would stall, the temperature reading would spike erratically. Heat soak was causing an internal failure in the module’s processor. Swapping in a new, VIN-programmed 2010-2011 Enclave ECM (the same part number) solved the problem instantly. It’s a classic example of how ECM failure isn’t always a simple ‘on or off’ issue.
A Straightforward Guide to Installation
- âś” Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- âś” Locate the ECM: On the Enclave, Acadia, and Traverse, the ECM is typically located behind the engine’s cooling fan shroud. You will need to remove the shroud for access. On other models like the CTS or LaCrosse, it may be in the engine compartment on the driver’s or passenger’s side.
- âś” Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Never force them. Inspect the pins for any corrosion or damage.
- âś” Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware safe as you will need it for the new module.
- âś” Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- âś” Reconnect Everything: Plug the electrical connectors firmly into the new module until they click into place. Reinstall the fan shroud and any other components you removed. Reconnect the negative battery terminal.
- âś” Final Step: In many cases, a security relearn procedure may be required. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. Your vehicle’s service manual will have the specific steps.
Important Note for Camaro & LaCrosse Owners: Due to the advanced immobilizer systems in the 2010-2011 Camaro and LaCrosse, a simple VIN flash is not enough for a plug-and-play installation. To ensure seamless operation, we require you to send us your original ECM. We will professionally extract the unique immobilizer data and transfer it to your new module. We will contact you with shipping instructions after your purchase to make this process smooth and easy.
Verified Vehicle Compatibility
This module, part number 12636355, is a direct replacement for several part numbers including 19300015, 19300014, 12617230, and 12635019. It is guaranteed to fit the following models equipped with the 3.6L V6 engine:
- 2010-2011 Buick Enclave (Behind fan shroud)
- 2010-2011 Buick LaCrosse (LH engine compartment)
- 2010 Buick Allure (LH engine compartment)
- 2010-2011 Cadillac CTS (RH front engine compartment)
- 2010-2011 Cadillac STS (RH engine)
- 2010-2011 Chevrolet Camaro (3.6L)
- 2010-2011 Chevrolet Traverse (Behind fan shroud)
- 2010-2011 GMC Acadia (Behind fan shroud)
- 2010 Saturn Outlook (Behind fan shroud)
Frequently Asked Questions
Why do you need my VIN?
Your VIN is essential. It allows us to load the exact GM-specified software for your vehicle’s unique configuration, including engine, transmission, and emissions options. This ensures perfect compatibility and performance, just like a module from the dealership.
Is this a plug-and-play part?
For most listed vehicles, yes! Because we program it to your VIN, it’s ready for installation. However, you may need to perform a simple key/security relearn procedure. For Camaro and LaCrosse models, we must transfer data from your old unit to make it plug-and-play, a service we coordinate with you after purchase.
Will this fix my specific problem?
This module will correct issues directly caused by a faulty ECM, such as internal processor errors (P0606), memory failures (P0601), or communication loss. While it’s a common failure point, we always recommend a proper diagnosis by a qualified mechanic to confirm the ECM is the root cause of your vehicle’s symptoms.
What if I have a Camaro or LaCrosse?
If you purchase this for a Camaro or LaCrosse, we will contact you after your order is placed. We will provide instructions for you to send your original ECM to us. This is a necessary step to transfer the immobilizer security information, ensuring your new module works without any anti-theft issues.
Does this part come with the latest software?
Absolutely. We flash every module with the most current software available from GM. This can improve drivability, fuel efficiency, and fix bugs that were present in the original factory programming.