  We study the Glashow-Iliopoulos-Maiani mechanism for
flavor-changing-neutral-currents suppression in both, the gauge and Higgs
sectors, for models with $SU(3)_L\otimes U(1)_N$ gauge symmetry. The models
differ one from the other only with respect to the representation content. The
main features of these models are that in order to cancel the triangle
anomalies the number of families must be divisible by three (the number of
colors) and that the lepton number is violated by some lepton-gauge bosons and
lepton-scalar interactions.

High Energy Physics - Phenomenology