Posted by OleManIdaho [164.165.59.8] on Thursday, April 26, 2012 at 15:24:13 :
In Reply to: 58 PG gas tank posted by BK in Redmond [98.149.241.149] on Thursday, April 26, 2012 at 14:53:26 :
My 59 has the plug and a filler pipe channel behind the seat. I believe they are for a tank that fit under the truck between the frame rails.