Description
2005 Cadillac STS 3.6L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2005 Cadillac STS 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
Lucas Keller –
I needed a replacement ECM for my 2005 Cadillac STS, and this unit arrived exactly as described. The VIN was programmed perfectly, making installation straightforward with no extra tuning required. What impressed me most was their prompt communication—I had a few questions before ordering, and they responded quickly and clearly. Shipping was free and arrived sooner than I expected, which was a nice bonus. After swapping it in, my car runs smoothly again, so I’m very satisfied with the quality and service.
Harrison Morgan –
Fast shipping and the ECU was ready to go right out of the box—saved me a ton compared to the dealer. Installation was smooth and the team was super professional.
Adrian Lewis –
I purchased the 2005 Cadillac STS 3.6L ECM from this seller and was really impressed with the seamless plug-and-play setup. The unit arrived quickly and was already VIN programmed, which saved me a lot of hassle. Shipping was surprisingly affordable considering the size of the part. Overall, the quality of the ECM and the fast turnaround made this a great buy.
Luis Scott –
Received my programmed ECM for the 2005 Cadillac STS quickly with free shipping, and it was a perfect plug-and-play fit—highly recommend!