Have you received reply from anyone since your post? Just though to ask if you are looking at OEM or aftermarket side-step? I know for the OEM, you can get the installation instruction from your local Toyota dealer parts/services department or otherwise, if you are subscribing to the TIS currently. Also, if you are a frequent DIY, the installation steps are quite straight forward and not hard to figure out yourself; basically, remove all the rubber plugs along each side of the under chassis, locate the holes under the chassis that aligns to the side-step support brackets, insert the screw hardware in to the chassis holes then raise/loosely fasten the side-step/brackets, finally align the side-step before tighten each screw to spec... Good luck!