Description
2004 GMC Sierra 6.6L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 GMC Sierra 6.6L 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
Steven Roberts –
I purchased the 15246462 ECM for my 2004 GMC Sierra, and the whole process was seamless. The unit arrived quickly with free shipping, which was a nice bonus. The plug-and-play setup made installation straightforward, and it worked perfectly right out of the box. I appreciate the clear communication from the seller, as they answered all my questions promptly.
Jeremy Murray –
I was pretty worried about replacing the ECM on my 2004 GMC Sierra, but this unit arrived quickly and was ready to go right out of the box. The fact that it came VIN programmed saved me so much hassle, and it truly was plug-and-play with no complicated setup. Installation went smoothly, and my truck started up immediately with no issues. I also have to say, going this route instead of the dealer saved me a ton of money, which was a huge relief. The communication from the seller was clear and professional throughout the entire process. Overall, I’m very happy with the purchase and would definitely recommend this service to anyone in a similar situation.
Eric Morris –
I ordered the 15246462 ECM for my 2004 GMC Sierra and was impressed by how quickly it arrived. The unit was plug-and-play, making the installation straightforward without the need for extra programming on my end. This saved me a significant amount compared to dealer quotes, and the customer service was responsive and helpful throughout the process. Overall, a smooth experience from start to finish.
Colin Taylor –
Super fast shipping and the ECM came already VIN programmed—plug and play was a breeze. Great service!
Kevin Jenkins –
I was nervous about ordering an ECM online, but this 2004 GMC Sierra 6.6L unit arrived quickly and already programmed to my VIN, which saved me a ton of hassle. The seller’s communication was outstanding—they answered all my questions promptly and kept me in the loop throughout the shipping process. Installation was straightforward, and once installed, my truck started right up with no issues. I really appreciated the professional programming service included because it gave me peace of mind. Overall, a smooth experience from start to finish, and the free shipping was a nice bonus.
Dean Young –
The ECM arrived quickly and was truly plug-and-play, saving me a ton compared to dealer prices—installation was smooth and hassle-free. The communication was clear, and the whole process was impressively fast.