Cant help you a whole lot on this issue but im going to say
that if you have a 4 cylinder it might not have enough power
to operate the hydraulic. But I could be wrong below I provided
some websites you might want to check out and call to get
some help. The second website I posted is my favorite one
because of the fact they dont turn your bed into a dump unit
but put in like a heavy duty liner inside your bed and its a simple
install and you can remove it when ever you want and put it
back in like nothing there was a video I had to watch it lol.
It might be cheaper to who knows
http://www.splitez.com/Dump_hoist_ki...kup_truck.html
http://www.dump-pro.com/ (This dump unit is pretty cool)
http://www.stealthdumptrucks.com/