  We exploit the recently developed software package LieART to show that SU(N)
grand unified theories with chiral fermions in mixed tensor irreducible
representations can lead to standard model chiral fermions without additional
light exotic chiral fermions, i.e., only standard model fermions are light in
these models. Results are tabulated which may be of use to model builders in
the future. An SU(6) toy model is given and model searches are discussed.
