The vibrational predissociation spectrum of the He-HCO+ proton bound complex has been recorded in the 3 mu m (C-H stretch) region by monitoring the HCO+ photofragment current. A rotationally resolved, parallel band is observed, red shifted 12.4 cm-(1) from the v(1) transition of free HCO+ Analysis in terms of a diatomiclike Hamiltonian yields B "=0.2900+/-0.0002 cm(-1), D "=(1.00+/-0.06)x10(-5) cm(-1), B’=0.2898+/-0.0010 cm(-1), and v(1)=3076.313+/-0.010 cm(-1). Localized perturbations to v(1) rotational levels are observed and are tentatively ascribed to interactions with combination vibrational states made up of quanta of the CO stretch and HCO+ bend, and those of the low frequency intermolecular stretches and bends. Rotational linewidths are laser bandwidth limited suggesting a lower limit of approximately 250 ps for the lifetime of the v(1) level.