Description
2004 GMC Envoy 4.2L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 GMC Envoy 4.2L 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
Brandon Howard –
I was really impressed with how quickly the ECM arrived—it shipped faster than I expected. Installation was straightforward since the unit came fully programmed and just plugged right in with no issues. Choosing this service saved me a significant amount compared to dealer prices, and their customer support kept me informed every step of the way. Overall, a smooth experience from start to finish.
Blake Kelly –
The unit arrived quickly and was truly plug-and-play, making installation a breeze. This service saved me a ton compared to dealer prices and their communication was spot on.
Chase Moore –
Fast shipping and the ECU was fully programmed and ready to install—saved me a ton of hassle. The whole process was smooth and straightforward.
Neil Reed –
I needed a replacement ECM for my 2004 GMC Envoy, and this unit fit perfectly. The VIN was already programmed, which made installation much easier than I expected. Shipping was very reasonable, and the whole process was smooth from start to finish. I appreciated how quickly they responded to my questions and kept me informed throughout the order.