Depends on what you have for tools-mine hasn't worked since I bought the truck in September-I'm getting tired of the mileage guess-I've run out twice, luckly the second time was in my driveway. Dropping the tank is the less involved, basically you reach thru the left fenderwell and unplug all the connections on top of the tank then support the tank with a transmission jack and unbolt the tank straps, lower the tank down, take the lock ring and gasket off, pull the gizmo in the tank, replace the float and put everything back together using a NEW lock ring and gasket. That's the short version directly from the service manual, pulling the body would involve about 8 bolts and a lift or other hoisting device, but you don't need a near empty tank. My take on the sending unit is that it's not that good and fails on a regular basis and because of clearence problems you have to pull either the tank or the body-depending on the weather I'm doing mine tommorow.