Thanks to any one that can help. I have a 05 colorado concept truck that GM removed the 5cyl engine and installed a newer generation 5.3 engine and a newer E67 computer and seperate trans computer T-42. The operating system in the computer is not production so I cant open or tune with EFI Live. The truck runs good except for a 30 MPH speed limit and I understand from some GM engineers they did this on purpose. I have tried installing a flash from a 08 trailblazer, (1st year with E67 5.3 engine) truck would not even crank over, this is way over my head, need help or someone in Phoenix,Arizona good with EFI live that can help. Where do I start?