S&B's 52-gallon fuel tank directly replaces the OEM 31-gallon tank without any cutting, drilling, or special modifications. This makes for a trouble-free, faster installation process. S&B's replacement fuel tank holds 2 more gallons than competitor tanks allowing you to save time, go futher, and get more out of your truck! Go big or go home! The fuel gauge will continue to work however the distance to empty will not be accurate. There is no way to update the fuel tank size for the distance to empty to be accurate. OEM sending unit & float are reused because the S&B Tank is taller the gauge will stay on full for the first 8-10 gallons. The nozzle at high-flow fuel stations(truck stops) will not be able to fill automatically.