Left turn signal problem on06' chevy tahoe

The flasher is under the dash.If you turn on the signal listen for it's location.Turn on your 4 way flasher and see if the left rear light is flashing.If it's not then replace the bulb.If it still does'nt work after replacing the bulb check if there is power to the socket. Use a probe light.If no power to the socket.There is a break in the wire or worse the signal switch may be the culprit

where did you get the flasher from? autozone? try to get another one from a good parts supplier. if not, check the bulbs themselves. if they are supposed to be a dual filiment bulb, and only a single filiment bulb is in there, it may not flash. try using the turn signals with the parking lights on. does this make a difference?

Fast flashing dash signals mean there is a bulb issue-DEFINATELY!

check all related fuses.Fuse panel on left side of dash.

I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!

sounds like one of the circuit bords at taillights is bad

Check the front and rear (although probably the rear) turn signal bulb socket for corrosion and/or water intrusion. If you find corrosion attempt to clean (but you will probably have to replace the socket and bulb). For water intrusion you will probably have to replace the break lamp assembly.

check the front right bulb

Sometimes even a new bulb will not work. If you have a Digital Multi Meter you can check that you have power going to the rear. I know that sometimes when a vehicle loses a bulb in one end that it can make the other end stop working. With that said, I suggest that you double check to see that the front works. I used to own a 98 Cavalier RS with the 2.2 liter motor and I know that there are fuses under the hood and behind a little door on the drivers side in the car. Might check fuses under the hood also.

Did you ever figure this out? I've got the same exact problem with my tahoe.