Restore Peak Performance to Your GM Vehicle
Is your 2010-2011 Buick Enclave, Acadia, or Traverse suffering from frustrating issues like a persistent check engine light, erratic shifting, or a no-start condition? As a technician with over two decades of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can wreak havoc on an otherwise reliable vehicle. The ECM is the brain of your engine, managing everything from fuel delivery and ignition timing to emissions controls. When it falters, the symptoms can be confusing and costly to diagnose.
This isn’t just a replacement part; it’s a comprehensive solution. We offer a genuine OEM Engine Control Module, part number 12635019, that arrives at your door pre-programmed with the latest GM software updates. All we need is your vehicle’s VIN at checkout. This critical step ensures the module communicates flawlessly with your vehicle’s specific systems, eliminating the need for an expensive trip to the dealership for programming. For owners of a 2010-2011 Camaro or Lacrosse, we provide a specialized cloning service to ensure your factory anti-theft system works seamlessly. We’ll contact you with simple instructions to send in your original module for this process.
Case Study: A Tricky Diagnosis
A customer brought in a 2011 Acadia with a complaint of intermittent stalling and a flashing check engine light. The codes were all over the place—U0100 for lost communication, P0300 for random misfires, and a few transmission codes. Less experienced shops might start throwing parts at it—plugs, coils, even a transmission sensor. But based on my experience with these 3.6L platforms, I suspected the ECM. We connected a scope and saw the 5-volt reference signal dropping out intermittently, a classic sign of internal ECM failure caused by years of heat cycles and vibration. Installing a properly programmed 2010-2011 Enclave ECM like this one resolved all the issues instantly. It’s a reminder that getting the core diagnosis right saves hundreds, if not thousands, in unnecessary repairs.
Common Signs of a Failing Engine Control Module
If you’re experiencing any of the following, a faulty ECM could be the culprit. This module is the direct fix for these common problems and associated trouble codes.
- ✔ Check Engine Light is illuminated with codes like P0601, P0606, or other processor faults.
- ✔ Vehicle refuses to start or has difficulty starting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine stalling, stuttering, or misfiring.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools (e.g., U0100).
- ✔ Loss of spark or fuel injector pulse.
A Straightforward Guide to Your ECM Installation
Installing your pre-programmed module is a manageable job for a DIYer with basic tools. Always follow proper safety procedures.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the ECM: On most of these crossover models (Enclave, Acadia, Traverse), the ECM is located behind the cooling fan shroud. On sedans like the CTS or Lacrosse, it’s typically in the engine compartment on the driver’s or passenger’s side. Refer to a vehicle-specific service manual if unsure.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and unplug them from the old ECM. Avoid forcing them.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Final Steps: Depending on your specific model, a security relearn procedure may be required. This typically involves cycling the key and can be done without special tools. Your vehicle is now ready to start.
Verified Compatibility for Your GM Vehicle
This module is a direct-fit replacement for the following vehicles equipped with the 3.6L engine. It is compatible with part numbers 19300015, 19300014, 12617230, 12636355, and 12635019.
- 2010-2011 Buick Enclave – Electronic Control Module; (behind fan shroud)
- 2010-2011 Buick Lacrosse – Electronic Control Module; (LH engine compartment), 3.6L
- 2010 Buick Allure – Electronic Control Module; (LH engine compartment), 3.6L
- 2010-2011 Cadillac CTS – Electronic Control Module; (RH front engine compartment), 3.6L
- 2010-2011 Cadillac STS – Electronic Control Module; (RH engine), (3.6L)
- 2010-2011 Chevrolet Camaro – Electronic Control Module; 3.6L
- 2010-2011 Chevrolet Traverse – Electronic Control Module; (behind fan shroud)
- 2010-2011 GMC Acadia – Electronic Control Module; (behind fan shroud)
- 2010 Saturn Outlook – Electronic Control Module; (behind fan shroud)
Frequently Asked Questions
Do I need to do any programming myself?
No. We program the module to your vehicle’s VIN before shipping. This ensures it’s ready for installation right out of the box, saving you a trip to the dealer. For Camaro and Lacrosse models, a simple cloning process of your old module is required for full plug-and-play functionality.
Is this a new or used part?
This is a high-quality, OEM-grade component that has been fully tested and programmed with the latest software available from GM for your vehicle. It is guaranteed to restore your vehicle’s functionality.
What information do you need from me?
After you place your order, you will need to provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to program the module correctly.
What if my part number is slightly different?
This module, 12635019, also replaces part numbers 19300015, 19300014, 12617230, and 12636355. As long as your vehicle is on the compatibility list, this part will function correctly.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of the ECM (common codes P0601-P0606), then yes, this part will resolve the issue. It’s always best to have a proper diagnosis to confirm the ECM is the root cause before ordering.
What is the security relearn procedure?
For many GM vehicles, it’s a simple process of turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this sequence three times. This allows the new ECM to sync with your vehicle’s anti-theft system.