Hello everyone.
I am new to the site and I had a question about my ecm. I got an ecm and harness from a guy that had given up on a project, it is from a "04 half ton" in his words. I worked in a GM dealer for about 15 years so I knew he had no clue about it. As I was modifying the harness for my project I learned that it is a 04 6.0l with a 4L80e. I have already done all the harness modifications so it will run my 5.3 4L60e combination.
My question is: Can I download a stock 04 file from the repository or do I need to go to the dealer and have them program a VIN for an 04 5.3l with 4l60e?
Thanks in advance.