Here's something you might not know. I live in Canada and travel to the USA lots. When I buy the same 87oc in the USA I average 1-2 extra miles per gallon more then my Canadian gas? Why? I think it's the additives.
http://www.ebay.com/itm/Tekonsha-P2-Digital-Electric-Brake-Control-w-Wiring-Harness-Adapter-Pigtail-Kit-/390698228942?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3ATacoma&hash=item5af76ddcce&vxp=mtr
This is what I used.