  Based on a specific model with U(3) family gauge symmetry at $10^3$ TeV
scale, we show its experimental signatures to search for. Since the gauge
symmetry is introduced with a special purpose, its gauge coupling constant and
gauge boson mass spectrum are not free. The current structure in this model
leads to family number violations via exchange of extra gauge bosons. We
investigate present constraints from flavor changing processes and discuss
visible signatures at LHC and lepton colliders.
