2002 Chevy Monte Carlo

Turn signal stops working every so often 1-2 times a day for only about 3-5 minutes, than just start working again. I checked all the bulbs, removed them to make sure there are no corrosion issues.

By stopped, are they lit but not blinking or totally dark, like no power to them? Could be switch or flasher.

I think the lights are on just not blinking, I will need to double check next time it happens. The dealer advised me to wait until it quits alltogether, and I will wait since the switch is over $400 +labor.
Flasher worked every time I tried, even when the turn signal stopped.