This proposal aims to probe the quadrupolar order believed to exist in the heavy fermion compound Ce3Pd20Si6 (CPS). Two phase transitions have been uncovered (in zero applied field), at TN = 0.15 K from data of ac-susceptibility,and a broad shoulder near T = 0.3 K inCp. In comparison with the isostructural compound CPGe, these two transitions have been assigned to antiferromagnetic and quadrupolar order respectively. However there is no experimental evidence for these two orders. CPS forms in a cubic crystal structure with the cerium atoms located on two different sites resulting in two interleaved cubic cerium sublattices. Recent inelastic neutron scattering experiments have determined the ground state of these two sites, Gamma 7 and Gamma 8, the latter of which can lead to multipole order. Probing the symmetry breaking effect of the quadrupolar order will identify this state.