Restore Peak Performance to Your Vehicle
Is your 2010-2011 Cadillac CTS, Buick Lacrosse, or Chevy Traverse suffering from frustrating engine issues? Stalling, poor fuel economy, and a persistent check engine light are often signs of a failing Engine Control Module (ECM). As the central computer for your engine, a faulty ECM can disrupt everything from fuel injection to ignition timing, leading to a cascade of performance problems. This direct-fit replacement ECM, part number 12636355, is the definitive solution to get your vehicle running like new again.
Unlike sourcing a module from a junkyard or dealership, this ECM arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest GM-certified software updates, ensuring optimal performance, fuel efficiency, and emissions control. This critical programming step eliminates the need for expensive dealership visits and specialized tools, making the repair process straightforward and cost-effective.
From the Diagnostic Bay
We recently had a 2011 Cadillac CTS in the shop with a maddeningly intermittent stalling problem. The owner had already replaced the spark plugs and a coil pack, but the car would still die at random stoplights. No consistent codes were being stored, just a generic U-code for lost communication every now and then. After hours of chasing wires and checking grounds, we hooked up a scope to the ECM’s main power and communication lines. We saw a clear voltage drop inside the module itself right before a stall event. The internal processor was failing under load. We installed one of these VIN-programmed ECMs, performed the necessary security relearn, and the car ran perfectly. It’s a classic example of how a failing computer can mimic a dozen other mechanical issues, and why a reliable, correctly programmed 2010-2011 CTS ECM is the only proper fix.
Is Your Vehicle Showing These Symptoms?
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Unexplained drops in fuel economy.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Error messages on the dash related to engine or stability control systems.
- ✔ Failure to pass state emissions testing.
The Importance of a VIN-Programmed 2010-2011 CTS ECM
Modern vehicles are complex networks of modules, and the ECM is the command center. It needs to know the exact specifications of your vehicle—engine size, transmission type, emissions equipment, and even the tire size—to function correctly. Our professional programming service uses your VIN to load the precise software and calibration files from GM for your specific build. This ensures all systems communicate properly and your engine operates within its designed parameters. Simply installing a used, non-programmed module will result in a no-start condition due to the vehicle’s anti-theft system and incorrect operational data.
Simple, Secure Ordering Process
Getting the right part is easy. After placing your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will handle the entire programming process before the module is shipped. This means that for most vehicles listed, the part is ready for installation right out of the box, with only a simple security relearn procedure potentially required.
Special Note for Camaro & Lacrosse Owners: For 2010-2011 Chevrolet Camaro and Buick Lacrosse models, the immobilizer (anti-theft) data is uniquely encrypted. To ensure a true plug-and-play experience, we require your original ECM to be sent to us. We will professionally extract this critical data and transfer it to your new module. We will contact you with clear instructions and a shipping label after your purchase to make this process as smooth as possible.
Guaranteed Fitment
This ECM is a direct replacement for multiple part numbers and fits a wide range of GM vehicles equipped with the 3.6L V6 engine. Please verify that your vehicle is on the list below. This module is compatible with part numbers: 19300015, 19300014, 12617230, 12636355, 12635019.
- Cadillac CTS (2010-2011) – 3.6L, Located in RH front engine compartment
- Cadillac STS (2010-2011) – 3.6L, Located in RH engine compartment
- Buick Allure (2010) – 3.6L, Located in LH engine compartment
- Buick LaCrosse (2010-2011) – 3.6L, Located in LH engine compartment
- Chevrolet Camaro (2010-2011) – 3.6L
- Chevrolet Traverse (2010-2011) – Located behind fan shroud
- GMC Acadia (2010-2011) – Located behind fan shroud
- Buick Enclave (2010-2011) – Located behind fan shroud
- Saturn Outlook (2010) – Located behind fan shroud
Frequently Asked Questions
Do I need to have this ECM programmed?
No, we handle all the programming for you before shipment. We use the VIN you provide to load the correct GM software and calibrations for your specific vehicle, saving you a trip to the dealership.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your specific car. It tells us everything we need to know about its factory options, engine, transmission, and emissions systems. Providing the VIN is essential for us to program the ECM correctly for your vehicle.
Where is the ECM located on my 2011 Cadillac CTS?
On the 2010-2011 Cadillac CTS, the ECM is located in the engine compartment on the right-hand (passenger) side, near the front of the vehicle.
Why do you need my old ECM for a Camaro or LaCrosse?
These specific models have a more complex vehicle anti-theft system (immobilizer). To ensure the new ECM communicates correctly with your key and other modules, we must transfer the security data from your original unit to the replacement one. This makes the installation plug-and-play and prevents a no-start situation.
Will this part fix my check engine light?
If the check engine light is on due to an internal failure of the ECM, then yes, this part will resolve the issue. However, the check engine light can be triggered by many other components (sensors, wiring, etc.). It is always best to have the vehicle properly diagnosed to confirm the ECM is the root cause of the problem.
Is any additional work needed after installation?
In some cases, a simple “Security Relearn Procedure” may be required. This procedure can typically be done without special tools and involves a series of key cycles. We include instructions for this common procedure with your order.