Is Your Cadillac STS Running Rough or Not Starting?
If your 2010-2011 Cadillac STS is suffering from perplexing issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or a no-start condition, the root cause might be a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle’s powertrain, responsible for managing everything from fuel injection and ignition timing to transmission shifts and emissions control. When it fails, it can create a cascade of problems that are often difficult to diagnose.
Don’t let a faulty computer keep your vehicle off the road. This is a direct-replacement Engine Control Module, part number 19300014, which comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load the latest GM-certified software onto the module before it ships, ensuring optimal performance, fuel efficiency, and emissions compliance. This eliminates the need for expensive programming at a dealership, saving you time and money.
From the Diagnostic Bay
We had a 2011 Buick Enclave come into the shop with a check engine light and a complaint of intermittent stalling at stoplights. The owner had already replaced the throttle body and two oxygen sensors based on the trouble codes, but the problem persisted. Our lead technician suspected the ECM. After connecting our diagnostic tools, we noticed the live data stream for the fuel trims was completely erratic, jumping from lean to rich with no logical reason. This pointed to a processing error within the module itself, not a faulty sensor. We installed a VIN-programmed ECM, performed the necessary relearn procedures, and the Enclave ran perfectly. It’s a classic case where chasing codes can be misleading; sometimes the computer processing the data is the real issue.
Symptoms of a Failing 2010-2011 STS ECM
A failing ECM can manifest in various ways. If you’re experiencing any of the following symptoms, it may be time to consider a replacement. Keep an eye out for:
- ✔ Unexplained Check Engine Light (CEL) illumination, often with communication-related (U-codes) or internal processor fault codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ A complete no-start condition where the engine cranks but won’t fire up.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Issues with other electronic systems, as the ECM communicates with multiple modules throughout the vehicle.
- ✔ Failure to pass an emissions test.
Plug-and-Play Solution with VIN Programming
This isn’t just a part in a box; it’s a comprehensive solution. The key to a successful repair is ensuring the replacement module is a perfect match for your vehicle’s factory settings. That’s why we require your VIN at checkout. Our technicians use your VIN to access the official GM database and flash this 2010-2011 STS ECM with the exact software and calibrations your vehicle was built with, plus any subsequent updates for improved performance and reliability. This process ensures that once installed, the module will communicate seamlessly with all other systems in your vehicle.
Important Note for Camaro and LaCrosse Owners: For these specific models, the anti-theft (immobilizer) data is stored uniquely within the original ECM. To provide a true plug-and-play unit, we will need you to send us your original module. We will professionally extract the immobilizer information and program it into the new ECM. This service is included and we will contact you with shipping instructions after your purchase.
Guaranteed Fitment
This module is a direct replacement for several part numbers and fits a wide range of GM vehicles equipped with the 3.6L V6 engine. Please verify your vehicle is on the list below.
- Cadillac STS: 2010-2011 (3.6L)
- Cadillac CTS: 2010-2011 (3.6L)
- Buick LaCrosse / Allure: 2010-2011 (3.6L)
- Buick Enclave: 2010-2011
- Chevrolet Traverse: 2010-2011
- Chevrolet Camaro: 2010-2011 (3.6L)
- GMC Acadia: 2010-2011
- Saturn Outlook: 2010
Compatible Part Numbers: 19300015, 19300014, 12617230, 12636355, 12635019
Frequently Asked Questions
Do I need to get this ECM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN when you order, and the module will arrive ready for installation and communication with your vehicle’s systems.
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 allows us to access the exact factory software, calibration files, and security information required to make this ECM work perfectly with your vehicle’s options and features.
Why do you need my old ECM for a Camaro or LaCrosse?
For the 2010-2011 Camaro and LaCrosse, critical anti-theft information is stored in the original ECM. To ensure the new module starts the car without issues, we must transfer this data from your old unit to the new one. We will provide instructions for this simple process after your purchase.
Is any additional work needed after I install the module?
In many cases, a Crankshaft Position System Variation Relearn (often called a CASE relearn) may be required using a compatible scan tool. This is a standard procedure after ECM replacement on many GM vehicles and ensures the engine runs smoothly and doesn’t set a misfire code. Some vehicles may also require a security relearn procedure, which can typically be done without special tools.
Where is the ECM located on my vehicle?
The location varies by model. For the Cadillac STS and CTS, it’s typically in the right-hand (passenger side) front of the engine compartment. For Traverse, Acadia, Enclave, and Outlook, it’s usually located behind the fan shroud. For the LaCrosse/Allure, check the left-hand (driver side) of the engine compartment.