The nuclear susceptibility and magnetization of a Van Vleck paramagnet PrCu6 have been measured through the nuclear ordering transition. At zero magnetic field, the susceptibility shows a critical behavior at the transition temperature of 2 mK. This critical behavior shrinks and disappears as the applied magnetic field is increased. It is found that this behavior of the susceptibility is consistent with the electrical resistivity anomaly near the transition in its frequency and magnetic field dependence. The magnetization in magnetic fields shows a ferromagnetic increase at the transition, which coincides with the resistivity decrease in the ordered state. [S0031-9007(98)08321-5].