turn signal problem

I have a 2001 Monte Carlo.Some times the turn signals dont work.If I leave the signal on and hit the 4-way then let off the 4-way the blinker will work normally.Any suggestions would help.
Thanks Scott

It Sounds Like The Multi-function Switch Has A Bad Contact. If The Hazzard Switch Is Located On Steering Column (will Need To Replace Mfs) Part # 26093874 Gm. If The Hazzard Switch Is Remote Located On The Front Dash ( Big Rectangle Button) You Will Need To Replace The Hazzard Switch Only. ( Very Common Part #10308099.

It is on the dash.Hope it works.Thanks for your help. Scott

change the flasher