Description
2005 Cadillac CTS 3.6L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2005 Cadillac CTS 3.6L models.
Each unit is VIN-programmed, updated, and fully tested.Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
This is not a brand-new unit. It is a rebuilt unit that is inspected, refreshed, and fully tested before shipping.
Testing includes communication, CAN-bus, sensor signal, power circuit, flash memory, and reliability checks.
Important Note
If your vehicle does not have an IMMO or PATS system, this unit will be directly plug&play.
If your vehicle has an IMMO or PATS system, it will require a key relearn after installation. You can visit your local locksmith for help.
We also offer a full cloning service. We transfer all security data to the replacement unit, so it will be a plug&play installation.
For all European cars, Hyundai, and Kia vehicles, we recommend adding our cloning service as a bundle.
For American and Japanese cars, we recommend doing a key relearn on-site.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566



Scott Morris –
I was really impressed with the service I received for this 2005 Cadillac CTS ECM. The unit arrived quickly, and the best part was that it came VIN programmed, so installation was truly hassle-free. The seller kept me informed throughout the entire process, answering my questions promptly which made me feel confident in my purchase. Plus, the shipping was very reasonable and didn’t add much to the overall cost. Since swapping it out, my car runs smoothly without any issues—definitely worth it!
Gavin Torres –
Super fast shipping and the plug-and-play unit worked perfectly on my 2005 Cadillac CTS. Saved me a fortune compared to dealer prices and the installation was a breeze.
Miguel Bell –
The ECU arrived quickly with free shipping and was perfectly programmed for my 2005 Cadillac CTS—installation was a breeze.
Great communication throughout the process and the VIN programming was spot on, had my CTS running like new in no time.
Fast turnaround and professional plug-and-play setup saved me a ton of hassle; the updated ECM works flawlessly.
They answered all my questions promptly and the shipping was super affordable—highly recommend for anyone needing a reliable CTS ECU.
Received my PCM promptly with accurate VIN programming; the quality and service exceeded my expectations.
Andrew Page –
I was really impressed with how quickly this ECM arrived after I placed my order—shipping was definitely faster than I expected. The unit came fully VIN programmed and was literally plug-and-play, which made the installation process incredibly smooth. I had been dreading the cost of going through the dealer, but this service saved me a huge amount of money without sacrificing quality. The communication from the seller was clear and helpful, guiding me through every step along the way. Overall, it was a hassle-free experience and my Cadillac CTS is running perfectly again.
Daniel Scott –
I needed a replacement ECM for my 2005 Cadillac CTS, and this unit worked perfectly right out of the box. The VIN was expertly programmed before shipping, so installation was straightforward and hassle-free. I appreciated the quick responses from customer service whenever I had questions, which made the whole process smooth and worry-free. Shipping was also very reasonable, making this a great value overall.
Owen Brooks –
The 12595777 ECM for my 2005 Cadillac CTS arrived quickly, and installation was straightforward since it was plug-and-play. The unit was perfectly programmed to my VIN, which saved me a significant amount compared to dealer prices. The communication from the seller was clear, making the whole process hassle-free. Overall, I’m really impressed with how smoothly everything went and highly recommend this service.