Restore Your Cadillac’s Signature Performance
Is your 2008-2009 Cadillac STS running rough, stalling unexpectedly, or displaying a persistent check engine light? A faulty Engine Control Module (ECM) can disrupt the sophisticated performance and smooth ride you expect from your vehicle, causing endless frustration. This professionally programmed ECM is the definitive, hassle-free solution to restore your Cadillac’s precise engine operation and get you back on the road with complete confidence. We take the guesswork out of the repair by programming the module to your specific Vehicle Identification Number (VIN) before it ships, making installation straightforward.
Common Symptoms & Your Solution
A failing ECM can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following, a faulty module is a likely culprit:
- Erratic idling or stalling
- Noticeable decrease in fuel economy
- Engine misfires or hesitation during acceleration
- Check Engine Light with ECM-specific Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606
- Transmission shifting problems
- No-start conditions where the engine cranks but won’t turn over
This module is the direct remedy for these issues. By replacing your old unit with this pre-flashed 2008-2009 Cadillac STS ECM 12623325, you are installing a reliable component loaded with the latest GM software to ensure peak performance and communication with all your vehicle’s systems.
Features & Tangible Benefits
- ✔ Plug & Play Installation: This module arrives programmed to your car’s exact VIN. No expensive trips to the dealership for flashing or key relearning are required.
- ✔ Latest GM Software: We flash each unit with the most current updates from General Motors, ensuring optimal engine performance, fuel efficiency, and emissions control.
- ✔ Restored Drivability: Eliminate the frustrating symptoms of a bad ECM. Enjoy the smooth acceleration and reliable operation you expect from your Cadillac.
- ✔ Guaranteed Compatibility: This module is a direct replacement for part numbers 12623325, 12628387, 12605672, 12630594, and 19300016.
- ✔ Cost-Effective Repair: Save hundreds of dollars compared to the cost of purchasing and programming a new module at a dealership.
- ✔ Peace of Mind Warranty: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Programming: From over 20 years of hands-on diagnostics, I can tell you that the biggest hurdle in replacing a modern ECM isn’t the hardware—it’s the software. An unprogrammed module is just a metal box. By programming this 2008-2009 Cadillac STS ECM 12623325 to your specific VIN before it leaves our facility, we eliminate the need for expensive dealer tools or towing. We’re not just sending you a part; we’re delivering a complete, ready-to-install solution that respects both your time and your vehicle.
Frequently Asked Questions
What information do you need from me after I order?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. We cannot program and ship the module without it. You can typically find your VIN on the driver’s side dashboard (visible through the windshield) or on the sticker in the driver’s side door jamb.
Is any additional programming required once I install it?
No. This ECM is a true plug-and-play solution. Because we program it to your VIN, it is ready to work with your vehicle’s existing systems, including the anti-theft system (Passlock/VATS), as soon as it is installed. In some rare cases, a Crankshaft Variation Relearn may be needed, which can be done with a capable scan tool.
Do I need to send my old ECM back to you?
No core charge or return is required for this part, saving you time and the hassle of return shipping.
Will this fix my specific check engine light codes?
This module is the correct fix for codes related to internal processor failure or memory errors within the ECM itself, such as P0601 through P0606. While it can resolve issues causing other codes, you should always diagnose the root cause of any code before replacing parts. This 2008-2009 Cadillac STS ECM 12623325 will not fix a problem caused by a faulty sensor or wiring.
Is this part compatible with models other than the Cadillac STS?
Yes, this ECM is also compatible with several other GM vehicles that use the 3.6L engine. This includes the 2008-2009 Cadillac CTS, 2009 GMC Acadia, 2009 Chevrolet Traverse, 2009 Saturn Outlook, and 2009 Buick Enclave. Please verify the part number to ensure an exact match for your vehicle.