Whats the difference between a fuel pump and module on 98 4x4 5.7 Chevy silverado extended cab?

On a 1998 Chevy Silverado 5.7L, the fuel pump and fuel pump module are not separate parts; they're integrated. The fuel pump module is the entire assembly that houses the fuel pump, the fuel level sensor, and sometimes other components like the fuel filter (depending on the specific year and configuration).

Think of it like this: the fuel pump is the heart that pumps the fuel, while the fuel pump module is the chest cavity that protects and supports the heart and also contains other vital organs (sensors) for the fuel system. You can't replace just the "heart" (fuel pump) without accessing and potentially replacing the whole "chest cavity" (fuel pump module).

When you need to replace the fuel pump in a 1998 Silverado, you're almost always replacing the entire fuel pump module. Mechanics often use the terms interchangeably in this context, but technically, the module is the larger assembly containing the pump and other parts.