Restore Peak Performance to Your GM Vehicle
Is your 2009 Saturn Outlook, GMC Acadia, or Cadillac CTS running rough, stalling, or showing a persistent check engine light? The Engine Control Module (ECM), often called the engine’s brain, is the central command unit responsible for managing everything from fuel mixture and ignition timing to emissions and transmission shifting. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose issues. This replacement ECM is the definitive solution to get your vehicle running reliably again.
This isn’t just a used part pulled from a salvage yard. Each module is meticulously inspected and then programmed with the latest official GM software updates specifically for your vehicle. By providing your Vehicle Identification Number (VIN) during checkout, you ensure that the module you receive is a 100% compatible, plug-and-play component, eliminating the need for an expensive trip to the dealership for programming.
We once had a 2009 Buick Enclave in the shop with a maddening intermittent stalling issue. The owner had already spent a small fortune replacing sensors and the fuel pump, but the vehicle would still die randomly at red lights. No consistent codes were stored. After exhausting all other possibilities, we connected a data logger to the ECM’s main processor. We discovered that the voltage regulator circuit inside the module was failing when it reached operating temperature, causing the processor to reboot. A replacement, pre-programmed 2009 Outlook ECM (the same family of modules) solved the problem instantly. This highlights how a faulty module can mimic many other component failures, making a reliable replacement the key to a successful repair.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, a faulty engine computer could be the culprit:
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Unexplained stalling, especially when warm or at idle
- ✔ A noticeable decrease in fuel economy
- ✔ Hesitation, stumbling, or lack of power during acceleration
- ✔ Intermittent starting problems or a complete no-start condition
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication error codes (U-codes) when scanned
- ✔ Misfire codes that persist after replacing plugs and coils
The Importance of a VIN-Programmed 2009 Outlook ECM
Modern vehicles are complex networks of computers that must communicate perfectly. Simply installing a used ECM from another vehicle will not work, as it’s coded to the original vehicle’s options and anti-theft system. Our programming service resolves this critical issue. We use your VIN to load the exact software and calibrations your vehicle was built with, plus any subsequent updates from GM for improved performance and reliability. This ensures your new ECM works seamlessly with the Body Control Module (BCM), Transmission Control Module (TCM), and anti-theft system right out of the box.
Guaranteed Fitment and Compatibility
This module is a direct replacement for a range of vehicles and part numbers. Please verify that your vehicle and original part number are listed below.
Replaces Part Numbers: 12623325, 12628387, 12605672, 12630594, 19300016
Fits The Following Vehicles:
- 2009 Saturn Outlook (Electronic Control Module; behind fan shroud)
- 2009 GMC Acadia (Electronic Control Module; behind fan shroud)
- 2009 Chevrolet Traverse (Electronic Control Module; behind fan shroud)
- 2009 Buick Enclave (Electronic Control Module; behind fan shroud)
- 2009 Cadillac CTS (Electronic Control Module; RH front engine compartment, 3.6L, VIN V)
- 2009 Cadillac STS (Electronic Control Module; RH engine, 3.6L)
- 2008 Cadillac CTS (Electronic Control Module; RH front engine compartment, 3.6L, VIN V)
- 2008 Cadillac STS (Electronic Control Module; RH engine, 3.6L)
Frequently Asked Questions
Why do you need my vehicle’s VIN?
Your VIN (Vehicle Identification Number) is essential for us to program the ECM with the correct software and calibrations for your specific vehicle’s engine, transmission, and options. This ensures a seamless, plug-and-play installation without needing a trip to the dealer.
Will I need to do anything after installing the module?
In most cases, the vehicle will start and run correctly. However, for optimal performance and to prevent a potential check engine light, we highly recommend that a professional technician perform a Crankshaft Position Sensor Relearn procedure (also known as a CASE Relearn) using a compatible scan tool after installation.
Is this part difficult to install?
For the SUV models (Outlook, Acadia, Traverse, Enclave), the ECM is located behind the fan shroud. While it is a direct bolt-in replacement, it can be a moderately involved job. If you are not comfortable with automotive repair, we recommend professional installation. Always disconnect the battery before beginning work.
What happens if I forget to provide my VIN?
We cannot ship your order without a VIN. The programming is the most critical part of this service. If you forget to add it during checkout, our team will contact you via email to retrieve it, which may delay your shipment.
Does this module come with a warranty?
Yes, all of our programmed modules come with a standard warranty against defects. Please refer to the warranty tab on this page for complete details and duration.