Two problems related to tank assembly have been reported for the 2003 Toyota Tacoma.
Gas tank fell off, till it was 2 to 3 inches off ground.
Slow fill up at the gas pumps. The tank takes 10-12 minutes to fill. It takes the gas very slowly. Pump will keep clicking off. The pump hose has to be kept half to three-quarters out in order that the gas flow into the tank.