They told me when I bought the harness that the computer didn't need to be flashed because of the year. They said that 2004 and 2005 didn't have the anti-theft. I have since learned that some do. Called the dealership and gave them the VIN and they couldn't tell me if it had anti-theft but based on the fact that the motor would run for short periods of time ( 1-10 seconds) on starting fluid, the anti theft can't be there because the coils are firing.