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I report results from the CLEO collaboration on semileptonic B decays,highlighting measurements of the Cabibbo-Kobayashi-Maskawa matrix elements Vcband Vub. I describe the techniques used to obtain the recent improvements inprecision for these measurements, including the use of the b -> s gamma photonspectrum to reduce hadronic uncertainties in semileptonic B decays. I alsoreport new measurements of Vcb using the inclusive semileptonic branchingfraction BF(B -> X e nu) and of Vub through study of the q^2 dependence of B ->pi l nu and B -> rho l nu.Comment: 3 pages, 3 figures, uses svjour.cls, submitted to Proceedings of EPS  200

|V cb |, |V ub |, and HQET at CLEO