2010 Toyota Sienna Owners Manual - Page 200
2010 Toyota Sienna Manual
Page 200 highlights
2 -1 . Driving proc e dure s Tur n signa l leve r Right turn Left turn Move and hold the lever partway to signal a lane change. The right hand signal will flash until you release the lever. Move and hold the lever partway to signal a lane change. The left hand signal will flash until you release the lever.