The event, which is the third round of the series, will attract over 40,000 fans to the Millennium Stadium, Cardiff on 14 June, and will be officially known as the FIM Fiat Vans British Speedway Grand Prix.
The title sponsorship is in addition to Fiat CV's elite sponsorship agreement of the nine round world championship series.
Commenting on the deal, Paul Godden, product manager, Fiat Commercial Vehicles said: "The SGP Series is a great sporting spectacle for Fiat Commercial Vehicles to be associated with.
"Through our elite sponsorship agreement last year we realised the unique brand building benefits of using the SGP Series as a vehicle to increase awareness of Fiat Commercial Vehicles internationally."
