Probably turn signal flasher
Replace the flasher relay.
Turn the emergency flashers on and make sure that they are flashing at a normal rate of speed. Then turn your emergency flashers off and try one of your turn signals and it should work.
Under the dash on the drivers side next to the fuse block. There are two: one for hazard flashers and one for turn signals. They are 1" x 1" square... most likely silver in color.
There are 2 separate flashers.jd
You probably need a new turn signal switch. I have a '96 Monte Carlo and I had to replace the turn signal switch to get the brake lights to work. Thankfully I had a brother who knew how to take off the steering column and replace. Hopes this helps!!!
The turn signal flasher on a 2001 Monte Carlo is behind the hazard button on the instrument panel. You have to take out the instrument panel bezel to access it. I found this out through a Haynes repair manual for that car. I have to replace mine and did some research. The turn signals and hazard lights are both tied into the same flasher. Hope this helps.
It's on the same plug as the hazard flasher, so you have to take off the dash panel, which isn't hard to do. My signals and flashers werent working so I had to take off the panel and put in some conductive gel into the plug contacts to get them working again.
If none of them work it is a bad Flasher Relay. Replace it.
First replace your turn signal flasher as it usually only costs 3-10 dollars; the location varies- many times they are on or near the column under the dash.
There is two clips that you have to take off the back of the headlight. then the whole thing will come out so you can get to the light that you are trying to replace.
the location of the hazard lights is on top of the steering colum.
on the dash above the radio