Where is the fuel gauge sensor located on a 2005 Chevy venture LS?

The fuel level sensor is located in the fuel tank and is mounted on the fuel "sender" assembly. This is the assembly that contains the fuel pump. The sensor comes as a unit with the attached float.

The sensor can be changed, separate from the fuel pump, but it may be a good idea to change the whole assembly while you are there IF you have had any problems with it. But you can save a little money by just changing the sensor.

You will have to drain and remove the fuel tank to get to the assembly.