I removed the seat assembly on my 50 GMC 1 ton today, what a job ! It had not been removed for about 30 years and every nut, bolt and clutch screw was stuck pretty well. The back nuts that hold the sliders in place where the hardest to remove, Don't forget to remove the two springs that pull the seat back to it's rearmost position before you try to lift the seat out like I did. Once the seat was out the tank removal was straight forward, removed the two nuts holding the straps in place, loosened the screws holding the connecter pipes on the tank filler and pulled up on the gas filler tube, this disconnected it from the tank but left the filler neck assembly in place in the cab wall. disconnected the sending unit wires and removed the wire from the clips holding them in place.After disconnecting the line to the engine under the cab, unscrew the fuel cutoff and the tank came free.I will be having the tank boiled tomorrow, will update on progress....gmguy
