The agent at the UMC office in Pisa requested the Homologation code EU emissions code for the car. I was able to obtain it from the Dealer in Rome EU 4. GM stated each component of the emissions separately i.e. CO2, HcO, etc. However, the agent wanted the Homologation code specific to Europe.

While on this topic of the UMC process, is there a process in which I can officially change the wheel/tire size on the car? Because my wheels are US sizes, my replacement tire choices are less than the best available in Europe. So for example I would like to step up to 19" in front and 20" in back. This would also allow for bigger brakes.

Sorry for the poor italian!!!