my 2003 venture fuel gauge stopped working

Try a bottle of Chevron Techron Plus int eh tank, it will clean the fuel level sensor. If the sensor is dirty this can fix your problem, just make sure it is this exact type of additive: http://bit.ly/Techron_Concentrate

it could also be a damage sending unit .I replace mine had to drop the fuel tank and remove it from the fuel pump .thre auto part stores don' t sell the sensor separate from the pump . so, I bought a used pump .what a pain