Description
2004 Chevrolet Impala 3.4L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 Chevrolet Impala 3.4L models.
Each unit is VIN-programmed, updated, and fully tested for a true plug-and-play installation with our cloning service.
Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
Every ECU is inspected, refreshed, and verified through advanced diagnostic tools. Testing includes:
Complete communication & CAN-bus verification
Sensor input/output and signal integrity checks
Injector & ignition pulse simulation
Power, ground, and load-circuit analysis
Flash memory integrity and checksum validation
Thermal and voltage-stress testing to confirm reliability
Important Note
Some vehicles with IMMO or PATS require key programming after installation. This is normal.
For a 100% plug-and-play solution, we recommend using our full cloning service. We transfer all security data to the replacement unit.
A prepaid shipping label will be emailed to you. Allow you to mail in your original computer to us for full cloning.
If cloning is not selected, the ECU will be VIN programmed, and a key relearn will be required after installation.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Andrew Wallace –
Fast shipping and the plug-and-play programming made swapping out my 2004 Impala’s ECM hassle-free. Definitely recommend!
Kyle Allen –
I purchased the 2004 Chevrolet Impala 3.4L ECM from this seller, and it arrived quickly with free shipping, which was a great bonus. The unit was already VIN programmed, making the installation hassle-free and truly plug-and-play. Their team communicated promptly when I had questions, keeping me informed throughout the entire process. Overall, the quality of the ECM exceeded my expectations and my car runs perfectly now.
Logan Murphy –
I was really impressed with how smoothly this 2004 Chevrolet Impala ECM arrived. The shipping was free, which was a nice bonus, and the unit was already VIN programmed and ready to install—no additional programming needed on my part. The whole process took just a couple of days from order to delivery, and once installed, my car ran perfectly without any hiccups. I also appreciated how the seller kept me informed throughout the entire process, answering all my questions promptly. Overall, a hassle-free experience that got my Impala back on the road quickly.
Oliver Smith –
I was really impressed with how smoothly the entire process went. The ECU arrived promptly, and since it was already VIN programmed, installation was a breeze—just plug and play. The team was great about answering my questions quickly, which put my mind at ease throughout the purchase. Shipping was free, which was a nice bonus considering the part’s size and value. My 2004 Impala is running better than it has in years, and I couldn’t be happier with the quality of the unit and the service overall.