Negative. Walk to the end of Terminal 6 TSA checkpoint towards the UA gates, and you'll find the food court, and there's elevator going down, and then follow the sign to walk the underground towards Terminal 5.
Actually, go to the end of Terminal 6 and go down the escalator. Walk down the LOOOONG hall (under the ramp taxiway) and you will come up another escalator and be in Terminal 5. Piece of cake! Man, I miss LAX!