Turn off the circuit breaker
Verify power is off with a voltage tester
Remove the existing outlet cover plate
Unscrew and pull the outlet from the box
Identify the line wires and load wires
Connect the incoming hot wire to the GFCI LINE brass terminal
Connect the incoming neutral wire to the GFCI LINE silver terminal
Connect any outgoing hot wire to the GFCI LOAD brass terminal
Connect any outgoing neutral wire to the GFCI LOAD silver terminal
Connect the ground wire to the green ground screw
Tighten all terminal screws securely
Fold wires neatly into the box
Mount the GFCI outlet into the box
Install the cover plate
Turn the breaker back on
Press the TEST button
Press the RESET button
Confirm the outlet works properly