How to replace fuel sending unit . on 1998 GMC Sonoma

Truck died at stoplight,checked for spark and that was good.I cannot hear fuel pump power up like I should when turning ignition.The truck has 300,000 miles on it so I think the pump has gone out.I sit easier to unbolt truck bed and lift it off in order to gain access and how difficult is that to do ?

1 answer
easier to drop the tank.
if you go by the bed, loosen all the mounts and slide the bed back to gain acess.

Roy