Guided ion beam techniques are used to measure cross sections as a function of kinetic energy for the reactions of Mn+, Cu+, and Zn+ with silane. Ionic products observed include MSiH(x)(+) (x = 0-3), as well as MH(+) and SiH3+. In the Cu+ and Zn+ systems, the major processes are formation of MSiH(2)(+) + H-2 at low energy and SiH3+ + MH at high energies, while ground-state Mn+ is relatively inert. Variation of source conditions allows the effect of electronic excitation on the reactivity of Mn+ to be studied. Excited states of Mn+ are significantly more reactive than ground-state Mn+. Thresholds for Cu+ and Zn+ reactions are measured and converted to yield 0 K bond dissociation energies (BDEs) for M(+)-Si, M(+)-SiH, M(+)-SiH2, and M(+)-SiH3 of 2.65 +/- 0.08, 2.55 +/- 0.28, greater than or equal to 2.39 +/- 0.07, and 1.00 +/- 0.26 eV, respectively, for M = Cu; and 2.84 +/- 0.10, 3.37 +/- 0.11, 1.65 +/- 0.09, and 3.11 +/- 0.15 eV for M = Zn. Evaluation of the thresholds for SiH3+ + CuH and ZnH+ + SiH3 are combined with previous studies in our laboratories to yield 0 K BDEs for Cu-H of 2.63 +/- 0.06 eV and for Zn+-H of 2.24 +/- 0.16 eV.