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




Elliot Ward –
Fast shipping and the ECU was plug-and-play with no hassle; saved me a bundle versus dealer prices. Communication was clear and installation went smoothly.
Trevor Bailey –
I was really impressed with how quickly this ECM arrived after I placed my order—shipping was definitely faster than I expected. When I received the unit for my 2005 Cadillac CTS, it was already VIN programmed and truly plug-and-play, which made installing it a breeze for me even without a lot of experience. The whole process saved me a ton compared to what the dealer quoted, and the communication from the seller was clear and helpful every step of the way. Once installed, my car fired up perfectly with no issues, and it’s running like new again. Overall, a smooth transaction and a great product that I would recommend to anyone needing a reliable replacement ECU.
Chase James –
The ECM arrived quickly with free shipping and was already programmed for my 2005 Cadillac CTS, making installation a breeze. Customer support was super responsive and made the whole process stress-free.
Andrew Ramirez –
I was really impressed with how quickly the ECM arrived after I placed my order—shipping was faster than expected. The unit was perfectly programmed for my 2005 Cadillac CTS and was truly plug-and-play, making installation seamless. This service saved me a significant amount compared to dealer prices, and their communication throughout the process made the whole experience hassle-free. Highly recommend to anyone needing a reliable replacement without breaking the bank.