Restore Peak Performance to Your GM Vehicle
Is your 2010-2011 Chevrolet Traverse, Buick Enclave, or GMC Acadia suffering from frustrating and unpredictable engine problems? Issues like random stalling, a persistent Check Engine Light, poor fuel economy, or a complete no-start condition often point directly to a failing Engine Control Module (ECM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can turn a reliable vehicle into a source of constant worry. This isn’t just an inconvenience; it’s a critical component failure that affects performance, fuel efficiency, and safety.
This replacement ECM, part number 12635019, is the definitive solution to get your vehicle running smoothly again. We take the guesswork and high dealership costs out of the equation. Before we ship your part, our experts will program it with the latest official GM software updates, specifically matched to your vehicle using the VIN you provide. This ensures that when your module arrives, it’s ready for a straightforward installation, restoring the precise engine management your vehicle had when it left the factory.
Case Study: A Tricky Diagnosis
I remember a 2011 Traverse that came into the shop with a laundry list of confusing symptoms. The owner reported intermittent stalling at red lights, hesitation on acceleration, and a transmission that seemed to shift harshly. They had already replaced the spark plugs and a coil pack with no improvement. We scanned it and found a generic communication error code (U0100) and a processor fault (P0606). Instead of just throwing more parts at it, we focused on the central hub: the ECM. After installing a freshly programmed module, every single issue disappeared. It’s a powerful reminder that the ECM is the brain, and when it falters, the whole system suffers.
Is Your Vehicle Showing These Common Signs of ECM Failure?
- ✔ Persistent Check Engine Light that won’t clear.
- ✔ Engine stalling, stumbling, or hesitating for no apparent reason.
- ✔ A noticeable drop in fuel mileage.
- ✔ The engine cranks but refuses to start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0606, or U0100.
A Straightforward Guide to Installation
Replacing your 2010-2011 Traverse ECM is a manageable task for a confident DIYer. Because we program it beforehand, you avoid a trip to the dealer for expensive software flashing.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On the Traverse, Acadia, Enclave, and Outlook, the ECM is typically located behind the engine’s cooling fan shroud. On sedans like the LaCrosse or CTS, it’s often found in the engine compartment on the driver’s or passenger’s side.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old ECM. They have locking tabs, so be gentle to avoid damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed ECM in place and securely fasten the bolts.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new module until they click. Reconnect the negative battery terminal.
- Perform Relearn (If Necessary): While often not required, some vehicles may need a security or crank-position relearn procedure. In many cases, the vehicle will start and run perfectly right away.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part number 12635019 and is also compatible with part numbers 19300015, 19300014, 12617230, and 12636355. It is verified to fit the following vehicles equipped with the 3.6L V6 engine:
- 2010-2011 Buick Allure
- 2010-2011 Buick Enclave
- 2010-2011 Buick LaCrosse*
- 2010-2011 Cadillac CTS
- 2010-2011 Cadillac STS
- 2010-2011 Chevrolet Camaro*
- 2010-2011 Chevrolet Traverse
- 2010-2011 GMC Acadia
- 2010 Saturn Outlook
*Please Note: For Chevrolet Camaro and Buick LaCrosse models, we require your original ECM to be sent to us. This allows us to transfer the specific immobilizer data, making the new module a true plug-and-play solution. We will contact you with shipping instructions after your purchase.
Frequently Asked Questions
Do I need to get this ECM programmed by a dealer?
No. We handle all the programming for you before shipment. We use your vehicle’s VIN to load the latest GM software, so it arrives ready to install, saving you time and money.
What is a VIN and why do you need it?
VIN stands for Vehicle Identification Number. It’s a unique 17-digit code for your specific car. We use it to access the exact factory software and calibration files required for your vehicle’s engine, transmission, and options, ensuring perfect compatibility.
Is this a difficult part to install myself?
For someone with basic mechanical skills, this is a very manageable job. The most important parts are disconnecting the battery and being careful with the electrical connectors. Since no programming is needed on your end, it’s a simple swap.
What does ‘plug and play’ mean for Camaro and LaCrosse models?
For these specific models, the anti-theft (immobilizer) system is deeply integrated. To make the new ECM ‘plug and play,’ we need to read the unique security data from your old ECM and write it to the new one. This ensures your keys will be recognized without any complex procedures.
Will this fix my check engine light?
If the check engine light is caused by an internal ECM failure (like codes P0601 or P0606), then yes, this part is the correct fix. However, if the light is on for another reason (like a bad sensor), you will still need to diagnose and repair that separate issue.