Turn off the circuit breaker for the outlet
Verify power is off with a voltage tester
Remove the outlet cover plate
Unscrew the GFCI outlet from the electrical box
Pull the outlet out gently
Take a photo or note the wire connections
Disconnect the wires from the old GFCI outlet
Connect the wires to the new GFCI outlet
Attach the black hot wire to the brass terminal
Attach the white neutral wire to the silver terminal
Attach the ground wire to the green terminal
Reconnect any line and load wires to the correct terminals
Secure the outlet back into the box
Reinstall the cover plate
Turn the breaker back on
Press the test and reset buttons to confirm proper operation