jm211 gas tank
hey,if it is the stock tank on the truck there is no access cover on the bottom of the tank,there is a sump a bout 5 inches square ,and 1/2 inch deep on the bottom of the tank that has a drain plug hole ,maybe the plug is loose or leaking from there,all it takes is a 1/2 square drive on a ratchet to tighten it up,however since this is a sump,water and therefore rust could be cause of the leak,thes truck tanks are prone to rusting out in the sump area,there is an access cover on the top of the tankl that holds the fuel pump/filter hanger,i would be careful about tightening the plug in the bottom of the tank,however if you can loosen it i would drain the tank and use fresh gas to drive truck,you didnt say if truck was running,i have just spent 200.00 to repair my m211 tank because of rust in this area,good luck ,keep posting,and remember gasoline is extremely flamable,if it is leaking much ,carry a fire extinguisher to be safe