Is Your GM Vehicle Experiencing Unexplained Engine Problems?
If you’re dealing with frustrating issues like stalling, a persistent check engine light, rough idling, or a complete no-start condition in your 2009 Buick Enclave, GMC Acadia, Saturn Outlook, or Chevy Traverse, a failing Engine Control Module (ECM) is a very likely culprit. The ECM is the brain of your vehicle’s engine, controlling everything from fuel injection and ignition timing to emissions systems and transmission shifting. When it begins to fail, it can create a cascade of confusing and often intermittent problems that can be difficult to diagnose.
Don’t let a faulty computer keep your reliable SUV or sedan off the road. This is a direct-fit replacement Engine Control Module, part number 12628387, that arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We take the guesswork and the expensive trip to the dealership out of the equation. By flashing the unit with the latest official GM software updates for your exact vehicle, we ensure a smooth installation process and restored performance.
From the Diagnostic Bay
We had a 2009 GMC Acadia come into the shop that was giving the owner fits. The vehicle would randomly stall at stoplights, and sometimes it wouldn’t restart for 10-15 minutes. Multiple shops had replaced the crankshaft sensor and the fuel pump, but the problem persisted. The dashboard was lit up with communication error codes (U-codes) along with a few random sensor codes that changed every week. After confirming the wiring harness and connectors were solid, we suspected the ECM. We connected a scan tool and monitored the live data stream; we could see the ECM’s processor was periodically dropping communication and failing to command the fuel injectors. We installed one of our pre-programmed modules, performed the security relearn, and the vehicle ran perfectly. The customer called back a month later to say the stalling issue was completely gone. It’s a classic case of a failing ECM creating ghost problems that lead technicians down the wrong path.
Symptoms of a Failing Engine Control Module
- ✔ Check Engine Light: The light is on, and you may have codes related to sensors, communication errors (U-codes), or processor faults.
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly while driving or at idle, and you might experience rough running or misfires.
- ✔ No-Start Condition: The engine cranks but refuses to start, often due to the ECM not commanding spark or fuel.
- ✔ Poor Performance and Fuel Economy: A noticeable drop in power, acceleration, and miles per gallon (MPG) can be a clear indicator of an ECM issue.
- ✔ Transmission Shifting Problems: The ECM communicates with the transmission controller, and a failure can lead to harsh or erratic shifting.
- ✔ Intermittent Issues: Problems that come and go with temperature changes or vehicle vibration often point to internal faults in the module’s circuit board.
Why Our Pre-Programmed 2009 Enclave Engine Module is the Right Choice
Getting your vehicle back to factory-spec performance is our priority. This isn’t just a generic, off-the-shelf part. It’s a comprehensive solution. When you order from us, we use the VIN you provide to load the precise software calibration your vehicle had when it left the factory, including any subsequent updates released by GM. This process is critical for ensuring all vehicle systems—from the engine and transmission to the anti-lock brakes and security system—communicate and function correctly. A generic module without this specific programming will simply not work. Our service saves you from needing specialized, expensive scan tools and a costly programming session at a dealership.
Guaranteed Compatibility
This module is a direct replacement for several original part numbers, ensuring a perfect match for your vehicle. It is compatible with the following part numbers:
- 12623325
- 12628387
- 12605672
- 12630594
- 19300016
This ECM fits a range of popular GM vehicles, including:
- 2009 Buick Enclave (Electronic Control Module; behind fan shroud)
- 2009 GMC Acadia (Electronic Control Module; behind fan shroud)
- 2009 Chevrolet Traverse (Electronic Control Module; behind fan shroud)
- 2009 Saturn Outlook (Electronic Control Module; behind fan shroud)
- 2008-2009 Cadillac CTS (Electronic Control Module; RH front engine compartment, 3.6L, VIN V)
- 2008-2009 Cadillac STS (Electronic Control Module; RH engine, 3.6L)
Frequently Asked Questions
Do I need to get this ECM programmed?
No. We handle the programming for you before we ship the part. Simply provide us with your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software specific to your vehicle. This makes the installation process much simpler.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, your insurance card, or on the vehicle itself. Look for a small metal plate on the driver’s side of the dashboard visible through the windshield, or on the sticker inside the driver’s side door jamb.
Is any special procedure needed after I install this module?
In most cases, you will need to perform a simple security relearn procedure (also known as a key relearn or anti-theft relearn). This procedure syncs the new ECM with your vehicle’s existing keys and security system. It typically involves a sequence of turning the key in the ignition and can be done by you in your driveway without any special tools. Instructions are widely available online for your specific model.
How can I be certain this is the correct part for my vehicle?
Please match one of the part numbers listed (e.g., 12628387, 12623325) to the number on your original module. Additionally, verify that your vehicle’s make, model, and year are included in our fitment list. Providing your VIN for programming is the final step to guarantee a perfect match.
What happens if I forget to provide my VIN?
We cannot ship the module until we have your VIN, as the programming is a critical part of the order. Our team will contact you via email or phone to request the VIN if it is not provided at checkout. This ensures you receive a part that works correctly right out of the box.