Caliero

Hello, I have a 2008 C6 6.2, imported from USA to Spain, then I have installed the european lights and harness, and I come from my dealer to program the BCM to european specs to make the lights run correctly. But here is the problem: When We put the car in European specifications, the lights run perfect, but I CANīT START THE CAR ENGINE!!. My dealer tells me that this is because european specs need to have installed on the car an anti theft steering wheel lock, but they dont know if installing this system (very expensive) will solve the problem.
Anybody knows hoy to make the car to start in european specs?
Thanks.