right turn signal problem

[chato0824]

I have a 1998 2 door Tahoe that is my daily. This morning I was letting the Tahoe get warmed up and was leaving and turned on my headlights and my right front turn signal stays on now. When I put the right signal on to turn there is a quick buzzing sound comes from the fuse box under the dash. When the headlights are turned off the signal works fine. Anyone ever had this happen and if so what was the problem? Thanks