The gas phase infrared spectra of the v(2) and v(4) fundamentals of SiH3+ have been measured between 730 and 1015 cm(-1). The ion was produced in an ac glow discharge in silane and hydrogen mixtures. Vibration-rotation transitions were detected using diode laser velocity modulation spectroscopy. 112 transitions were included in a combined fit of both bands which yielded B-0=5.214 51(27) and C-0-2.585 20(38) cm(-1). The v(2) [838.0669(24) cm(-1)] and v(4)[938.3969(36) cm(-1)] bands are coupled by a Coriolis x,y resonance for which xi(24) = -3.8339(22) based on a calculated value of xi(4)=-0.05127, Experimental band origins and rotational and quartic distortion parameters are compared with recent ab initio calculations.