A statistical combination of searches for heavy resonances decaying to pairs of bosons or leptons is presented. The data correspond to an integrated luminosity of 35.9\fbinv collected during 2016 by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13\TeV. The data are found to be consistent with expectations from the standard model background. Exclusion limits are set in the context of models of spin-1 heavy vector triplets and of spin-2 bulk gravitons. For mass-degenerate W' and Z' resonances that predominantly couple to the standard model gauge bosons, the mass exclusion at $95\%$ confidence level of heavy vector bosons is extended to 4.5\TeV as compared to 3.8\TeV determined from the best individual channel. This excluded mass increases to 5.0\TeV if the resonances couple predominantly to fermions.