2008-2009 Cadillac STS ECM Engine Control Module 12623325

Pre-Programmed for an Easy Install

Get your 2008-2009 Cadillac STS or other GM vehicle running smoothly again with this Engine Control Module. It comes pre-flashed with the latest GM software matched to your VIN, eliminating the need for a costly dealership visit. Order now to restore your engine’s performance and reliability.

$249.00

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-01037-17 Categories: ,
Guaranteed Safe Checkout

Restore Peak Performance to Your Cadillac or GM Vehicle

Is your 2008-2009 Cadillac STS, CTS, or other compatible GM vehicle suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a sudden drop in fuel economy? These are classic signs of a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, responsible for managing everything from fuel injection and spark timing to emissions control. When it falters, the entire system is compromised. This replacement Engine Control Module, part number 12623325, is the definitive solution to restore your vehicle’s factory performance and reliability.

From the Diagnostic Bay

We had a 2009 Cadillac CTS 3.6L come into the shop with a laundry list of complaints: intermittent stalling at red lights, a check engine light with random misfire codes (P0300), and what the owner described as ‘lazy’ acceleration. The previous mechanic had already replaced the spark plugs, ignition coils, and even a camshaft position sensor, but the problems persisted. After hooking up our professional scan tool, we noticed erratic data streams coming from the ECM and a failure to communicate with the transmission module under certain conditions. This pointed directly to an internal fault in the engine computer. Instead of guessing with more sensors, we installed a VIN-programmed ECM like this one. After the quick security relearn, the car ran perfectly. It’s a textbook example of how a failing ECM can mimic other component failures, costing you time and money on unnecessary parts.

Is Your Vehicle Showing Signs of a Bad ECM?

A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your ECM is the culprit:

  • ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
  • ✔ Engine cranks but refuses to start.
  • ✔ Noticeable decrease in fuel efficiency.
  • ✔ Rough or unstable idling.
  • ✔ Engine stalling or hesitating during acceleration.
  • ✔ Misfires or poor engine performance.
  • ✔ Communication errors with diagnostic scan tools.
  • ✔ Issues with automatic transmission shifting.

The Simple, Dealer-Free Solution: A Pre-Programmed 2008-2009 Cadillac STS ECM

Replacing an ECM isn’t just about swapping hardware. A new module is essentially a blank slate and requires specific programming to your vehicle’s unique Vehicle Identification Number (VIN). Traditionally, this meant towing your car to a dealership for expensive flashing services. We eliminate that step entirely. When you order from us, we use your VIN to load the latest, most stable GM-certified software directly onto the module before it ships. This ensures that the ECM is perfectly matched to your vehicle’s specific configuration, options, and emissions standards. It arrives at your door ready for installation, saving you hundreds in dealership fees and diagnostic time. This is the most efficient and reliable way to get your car back on the road.

Guaranteed Compatibility and Fitment

This module is a direct replacement for several original equipment part numbers. Please verify that your original module’s part number is on this list:

Compatible Part Numbers: 12623325, 12628387, 12605672, 12630594, 19300016

This ECM is confirmed to fit the following vehicles with the specified options:

  • 2009 Acadia: Electronic Control Module; (behind fan shroud)
  • 2008-2009 Cadillac CTS: Electronic Control Module; (RH front engine compartment), 3.6L, VIN V (8th digit)
  • 2008-2009 Cadillac STS: Electronic Control Module; (RH engine), 3.6L
  • 2009 Enclave: Electronic Control Module; (behind fan shroud)
  • 2009 Outlook: Electronic Control Module; (behind fan shroud)
  • 2009 Traverse: Electronic Control Module; (behind fan shroud)

By providing your VIN, you guarantee a perfect software match, making the installation process as smooth as possible. A simple anti-theft security relearn procedure may be required after installation, which can typically be done without special tools and instructions can be readily found online for your specific model.

Frequently Asked Questions

Do I need to have this ECM programmed?

No. The main benefit of our service is that we program the module for you before shipping. Simply provide us with your vehicle’s VIN during or after checkout, and we will flash the unit with the latest GM software specific to your car. This makes it ready for installation right out of the box.

What is a VIN and where do I find it?

The VIN, or Vehicle Identification Number, is a unique 17-digit code for your car. You can easily find it on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.

Is this a plug-and-play part?

Essentially, yes. Because we pre-program it, you will not need a high-end scan tool for software installation. However, like any ECM replacement on these GM vehicles, you may need to perform a simple key relearn or security relearn procedure. This typically involves a series of key turns and waiting periods and does not require a trip to the mechanic.

What happens if I install it without providing a VIN?

The module will not have the correct software for your vehicle’s specific systems. This will result in a no-start condition, a check engine light, and improper function of various components. Providing your VIN is a mandatory step to ensure the part works correctly.

Will this fix my car’s specific problem?

This module will correct any issues directly caused by a faulty ECM. If your vehicle’s symptoms match the common failure signs listed above, there is a very high probability this part will resolve the problem. However, we always recommend a proper diagnosis by a qualified mechanic to rule out other potential issues like wiring or sensor faults.

Genuine OEM

Yes

Year
Condition

Refurbished

MPN

12623325

Brand

GM

Year

2009

Model

STS

Hardware Type

Interchange part number

Manufacturer Part Number

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