Description
2004 Buick Park Avenue 3.8L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 Buick Park Avenue 3.8L 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
Tyler Douglas –
I was a bit nervous about ordering an ECM online, but this 2004 Buick Park Avenue PCM exceeded my expectations. The programming was spot on for my VIN, so installation was straightforward with no issues. Shipping was very reasonable and arrived quicker than I thought, which was a huge plus. Throughout the process, the seller kept me updated and answered all my questions promptly, making the whole experience smooth and hassle-free. My car runs like new again, and I’m really happy with the service.
Neil Murphy –
The ECU arrived quickly with free shipping, and it was perfectly programmed for my 2004 Buick Park Avenue—plug-and-play made the install a breeze.
Great communication throughout the process, and the updated ECM worked flawlessly right out of the box.
Fast turnaround and the professional programming saved me a ton of hassle—highly recommend for anyone needing a reliable replacement.
Grant Scott –
I ordered the 2004 Buick Park Avenue ECM and was really impressed with how quickly it arrived, especially since the shipping was free. The unit was already VIN programmed, so installation was straightforward and hassle-free. Their team kept me updated throughout the entire process and answered all my questions promptly, which made the experience stress-free. The car runs perfectly now, definitely worth it.