Is Your Cadillac CTS Running Rough, Stalling, or Not Starting at All?
If you’re dealing with frustrating engine problems on your 2010-2011 Cadillac CTS, the root cause is often the very component that’s supposed to be in charge: the Engine Control Module (ECM). As a technician with over two decades of experience under the hood, I’ve seen countless GM vehicles with the 3.6L engine exhibit a specific set of symptoms that point directly to a failing ECM. It’s the central computer for your engine, and when it starts to falter, the entire vehicle’s performance suffers.
Common Symptoms of a Failing 3.6L ECM
A bad ECM doesn’t always fail completely. Often, it’s a slow decline, causing intermittent issues that are a nightmare to diagnose. You might be experiencing:
- ✔ A persistent Check Engine Light with communication-related fault codes (U-codes) or random sensor codes.
- ✔ The engine cranks but refuses to start, even with a good battery and fuel supply.
- ✔ Unexplained stalling, especially when the engine is warm.
- ✔ Poor fuel economy and a noticeable loss of power.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The cooling fans running constantly, even when the engine is cold.
Expert Pro Tip: Check Your Grounds First!
Before you condemn your ECM, do a thorough check of the main engine and body ground connections. In my shop, I’ve seen dozens of cases where a loose or corroded ground strap caused voltage issues that mimicked a bad ECM. Specifically, check the main ground on the engine block and the one from the battery to the chassis. A few minutes with a wrench can sometimes save you hundreds of dollars and a lot of diagnostic headaches. If the grounds are clean and tight and the problems persist, the ECM is the next logical culprit.
The Plug-and-Play Solution: A VIN-Programmed ECM
Replacing an ECM isn’t just a simple swap. The dealership will sell you a blank module, which then requires an expensive and time-consuming programming session with their proprietary tools. Our solution eliminates that entire step. This ECM is the answer to getting your vehicle back on the road quickly and reliably.
When you purchase from us, you’re not just getting a part; you’re getting a complete service. We take your vehicle’s unique Vehicle Identification Number (VIN) and flash this module with the latest, most stable software updates directly from GM. This ensures that all factory parameters for your specific vehicle are perfectly loaded, correcting common software glitches and optimizing performance.
**Critical Information for Camaro and LaCrosse Owners**
Due to the specific anti-theft (immobilizer) systems in the 2010-2011 Camaro and LaCrosse, a simple VIN flash isn’t enough to make the module plug-and-play. For these two models, we have a straightforward process to ensure a seamless installation:
- ✔ After your purchase, we will contact you with instructions.
- ✔ You will need to send us your original, failed ECM.
- ✔ We will professionally extract the unique immobilizer data from your old module.
- ✔ We then program this critical data into your new ECM, along with the VIN-specific engine software.
- ✔ The result is a truly plug-and-play module that will start and run your vehicle without any additional security relearn procedures.
Guaranteed Fitment for Your Vehicle
This Engine Control Module is a direct-fit replacement for a wide range of GM vehicles equipped with the 3.6L V6 engine. Please verify your model and year below:
- ✔ Cadillac CTS: 2010-2011 (Located in RH front engine compartment)
- ✔ Cadillac STS: 2010-2011 (Located in RH engine compartment)
- ✔ Buick LaCrosse: 2010-2011 (Located in LH engine compartment)
- ✔ Buick Allure: 2010 (Located in LH engine compartment)
- ✔ Buick Enclave: 2010-2011 (Located behind fan shroud)
- ✔ Chevrolet Camaro: 2010-2011 (3.6L)
- ✔ Chevrolet Traverse: 2010-2011 (Located behind fan shroud)
- ✔ GMC Acadia: 2010-2011 (Located behind fan shroud)
- ✔ Saturn Outlook: 2010 (Located behind fan shroud)
Replaces Multiple Part Numbers
This module is a fully compatible replacement for the following GM part numbers, ensuring it meets or exceeds original factory specifications:
- ✔ 12636355
- ✔ 19300015
- ✔ 19300014
- ✔ 12617230
- ✔ 12635019