Restore Peak Performance to Your GM Vehicle
Is your 2008-2009 Cadillac CTS, Acadia, or STS suffering from perplexing engine issues? Unexplained stalling, a persistent Check Engine Light, or a complete no-start condition can often be traced back to a failing Engine Control Module (ECM). As the central computer for your engine, the ECM is responsible for managing everything from fuel injection and ignition timing to emissions control and transmission shifting. When it fails, the entire vehicle’s performance and reliability are compromised. This replacement ECM, part number 12623325, is the definitive solution to restore your vehicle’s factory performance and get you back on the road with confidence.
Common Symptoms of a Failing ECM
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, your ECM could be the culprit. Keep an eye out for these tell-tale signs:
- ✔ Check Engine Light: The light is illuminated on your dashboard, often with codes that are inconsistent or point to communication errors (U-codes).
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly while driving or at idle, and you might notice rough running or misfires.
- ✔ No-Start Condition: The engine cranks but refuses to start, indicating a potential lack of fuel or spark command from the ECM.
- ✔ Poor Fuel Economy: A sudden and significant drop in your vehicle’s gas mileage can be caused by incorrect fuel mixture calculations from a failing module.
- ✔ Inconsistent Performance: You may notice hesitation during acceleration, erratic shifting from the automatic transmission, or a general lack of power.
- ✔ Failure to Communicate: A diagnostic scan tool may be unable to establish a connection with the ECM, making diagnosis impossible.
The Plug-and-Play Solution: A Pre-Programmed 2008-2009 Cadillac CTS ECM
The biggest hurdle in replacing a modern engine computer is the complex programming required to make it work with your specific vehicle. This module eliminates that obstacle. We handle the programming for you before it ever leaves our facility. Simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN) during checkout. Our technicians will use this VIN to flash the module with the latest, most up-to-date software directly from General Motors. This ensures that the ECM is perfectly matched to your vehicle’s factory specifications, including its engine, transmission, and emissions equipment. This process makes the installation as straightforward as possible, saving you a costly trip to the dealership and hours of labor.
Wide Compatibility Across the GM Lineup
This ECM is a direct replacement for several part numbers and fits a range of popular 2008-2009 GM vehicles equipped with the 3.6L V6 engine. Verify that your vehicle and original part number are on this list for guaranteed compatibility.
- Compatible Part Numbers: 12623325, 12628387, 12605672, 12630594, 19300016
- Vehicle Fitment:
- 2008-2009 Cadillac CTS (3.6L, VIN V)
- 2008-2009 Cadillac STS (3.6L)
- 2009 GMC Acadia
- 2009 Chevrolet Traverse
- 2009 Saturn Outlook
- 2009 Buick Enclave
Frequently Asked Questions
Do I need to have this ECM programmed by a dealer?
No. This is the primary benefit of our service. We program the module to your vehicle’s specific VIN before we ship it to you. This makes it ready for installation right out of the box, saving you time and money.
What information do you need from me?
After you place your order, you must provide us with your vehicle’s 17-digit VIN. You can typically find this on the driver’s side of the dashboard (visible through the windshield), on the driver’s door jamb sticker, or on your vehicle’s registration and insurance documents.
Is any other procedure required after installation?
In many cases, you will need to perform a security relearn procedure (also known as a Passlock or anti-theft relearn). This procedure syncs the new ECM with your vehicle’s anti-theft system and keys. It’s a simple process that can often be done without special tools and instructions are widely available online for your specific model.
How can I be sure my old ECM is the problem?
While the symptoms listed are strong indicators, we always recommend a thorough diagnosis by a qualified mechanic. They can confirm that the ECM is the root cause by checking for power, ground, and communication signals at the module before you order a replacement.
Where is the ECM located on my 2008 Cadillac CTS?
On the 2008-2009 Cadillac CTS, the ECM is typically located in the engine compartment on the right-hand (passenger) side, often near the front. On other compatible models like the Acadia or Traverse, it is located behind the fan shroud. Always disconnect the battery before attempting removal or installation.