What are the 3 lines for Chevy fuel pump module?

There aren't just *three* lines universally applicable to all Chevy fuel pump modules. The number and function of lines vary depending on the year, make, model, and engine of the vehicle. However, you'll typically find variations including these:

1. Fuel Feed Line: This line supplies fuel *to* the fuel pump module from the tank.

2. Fuel Return Line: This line carries excess fuel *back* to the tank. Not all systems use a return line; some are returnless.

3. Power Line: This is a wire, not a line, carrying electrical power *to* the fuel pump module. This is crucial and often thicker gauge wire than the other lines.

Sometimes you'll also find:

* Fuel Pressure Sensor Line: A line for a sensor monitoring fuel pressure.

* Vapor Line: A line for fuel tank vapor return.

To accurately identify the lines on *your* specific Chevy fuel pump module, you need to consult a repair manual specific to your vehicle's year, make, and model. Improperly connecting these lines can be dangerous and damage your vehicle's fuel system.