Is Your Cadillac STS or GM 3.6L Vehicle Running Poorly?
A failing Engine Control Module (ECM), often called the vehicle’s main computer, can be the source of countless frustrating and difficult-to-diagnose issues. If your 2010-2011 Cadillac STS, CTS, Buick LaCrosse, or Chevy Traverse is experiencing problems like a persistent check engine light, stalling, poor fuel mileage, or a no-start condition, the ECM could be the culprit. This critical component manages everything from fuel injection and ignition timing to transmission shifting and emissions systems. When it fails, the entire vehicle’s performance suffers.
Don’t let a faulty computer keep you off the road. This is a direct-fit replacement Engine Control Module, part number 12636355, for a wide range of 2010-2011 GM vehicles equipped with the 3.6L V6 engine. The best part? It arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN) with the latest software updates from General Motors. This eliminates the need for expensive trips to the dealership for programming, saving you time and money.
From the Diagnostic Bay
We had a 2011 Buick Enclave come into the shop on a tow truck. The customer said it would crank but never start, and sometimes it would start but run terribly for a few seconds before stalling. They had already replaced the battery, spark plugs, and a couple of sensors with no luck. The check engine light was on, but their generic scanner couldn’t communicate with the ECM. Using our professional scan tool, we found multiple U-codes (communication loss codes) pointing to an internal ECM failure. The module simply wasn’t communicating properly with the rest of the vehicle’s systems. We installed one of these VIN-programmed modules, and the vehicle fired up on the first try and ran perfectly. It’s a classic case of how a single electronic component can mimic a dozen different mechanical problems.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Intermittent or complete no-start conditions where the engine cranks but won’t fire.
- ✔ Noticeable decrease in fuel economy.
- ✔ Poor engine performance and lack of power.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
Your Reliable 2010-2011 STS Engine Control Module Solution
Finding the right part is only half the battle; ensuring it works correctly is what truly matters. This isn’t just a used part pulled from a salvage yard. Each module is inspected and then programmed with the latest GM-certified calibration for your exact vehicle. By providing us with your VIN during checkout, you guarantee that the module you receive is a perfect match for your vehicle’s factory settings and options. This process ensures seamless integration and restores the performance and reliability you expect from your vehicle. A properly functioning 2010-2011 STS Engine Control Module is essential for optimal engine health, fuel efficiency, and emissions compliance.
Simple, Hassle-Free Process
Our goal is to make this repair as straightforward as possible. Here’s how it works:
- Purchase the Module: Complete your order for this ECM.
- Provide Your VIN: After your purchase, you will need to send us your 17-digit VIN. You can typically find this on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your insurance/registration documents.
- We Program It: Our technicians will flash the module with the correct GM software for your vehicle.
- We Ship It: The module is shipped directly to you, ready for installation.
Important Note for Camaro & LaCrosse Owners: For these specific models, the immobilizer (anti-theft) data is stored within the original ECM. To make your new module plug-and-play, we require you to send us your old module. We will securely transfer this critical data to the new unit. We will contact you with shipping instructions after you place your order.
Guaranteed Fitment
This module is a direct replacement for part number 12636355 and is also compatible with part numbers 19300015, 19300014, 12617230, and 12635019. It is confirmed to fit the following vehicles with the 3.6L engine:
- 2010-2011 Cadillac STS
- 2010-2011 Cadillac CTS
- 2010-2011 Buick LaCrosse
- 2010 Buick Allure
- 2010-2011 Chevrolet Camaro
- 2010-2011 Chevrolet Traverse
- 2010-2011 GMC Acadia
- 2010-2011 Buick Enclave
- 2010 Saturn Outlook
Take the guesswork out of your repair. With a pre-programmed 2010-2011 STS Engine Control Module, you can confidently restore your vehicle’s brainpower and get back to driving with peace of mind. Order yours today and solve those persistent engine problems for good.
Frequently Asked Questions
What is an ECM and what does it do?
The Engine Control Module (ECM) is the central computer that controls all aspects of your vehicle’s engine. It takes data from sensors all over the engine and uses it to manage fuel delivery, spark timing, emissions systems, and more to ensure the engine runs efficiently and powerfully.
Do I need to do any programming after I receive this module?
No. This module arrives pre-programmed to the VIN you provide. In most cases, it is a plug-and-play installation. Some vehicles may require a simple security or crankshaft position sensor relearn procedure, which can be done with a capable scan tool or by following specific vehicle instructions.
How do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found in several places: on the driver’s side of the dashboard (visible through the windshield), on the sticker in the driver’s side door jamb, and on your vehicle registration and insurance documents.
Why do you need my VIN?
The VIN allows us to load the exact factory software and calibrations for your specific vehicle. This includes information about the engine, transmission, emissions equipment, and other options, ensuring the ECM works perfectly upon installation.
What happens if I have a 2010-2011 Camaro or LaCrosse?
For these two models, we will need you to send your original ECM to us. This is necessary to transfer the vehicle’s unique anti-theft immobilizer information to the new module. This makes the replacement a true plug-and-play part without needing dealer intervention. We will provide clear instructions after you place your order.