What type of info are you looking for?
If its has a cord it should be located in the front passengers side of the lower bumper hidden away where the tow hook is, at least thats where mine is. If no cord you can buy a replacement for it at any automotive store. Did you buy the truck new or used? Normally the dealers or shops don't install a block heater without a cord. So if you bought new I would be very supprised to find out someone installed a block heater without a cord, but if you bought used you never know what the previous owner did or why.
This should be the approx location of your block heater on the 2009