does anybody know if these will affect anything in a bad way? will it affect the active fuel control?

also anybody that has installed subwoofers in there tahoe please help me out with the wiring?

 

I emailed Superchips and talked to a tech. They do have a chip for 07 Hoe 5.3. They said it does not interfere with DOD. However, they had not done any testing with E85, and were not sure what would happen if you ran the programming with a tank of E85. I suppose if you never run E85 you'll be fine but I was a little leery so I'm staying away for now....