Fast flashing can be an indication of a burned out bulb. Check that out first. Otherwise it most likely is the flasher unit going bad.
SOURCE: Chevy Cavalier 2001 turn signal blinks fast
If new bulbs don't work, it is probably the harness that holds the bulb. I had to replace both on my car after fighting with the problem for over a year and not knowing.
SOURCE: 2003 Chevy S10 Pickup fast flashing signal lights
like he said check you brake box to though. we did that and the wires to the brake box came loose.
SOURCE: LEFT TURN SIGNAL FLASHING TOO FAST
when a turn signal indicator flashes faster than is normal it is your vehicles way of telling you there is a problem with the lighting system, do a visual check of your turn signals and you will find a burned out bulb. just replace the bad one and it will return to normal
SOURCE: 99 Chevy Tahoe... Rear turn signals, brake lights, and hazards
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!
SOURCE: 2000 chevy silverado truck, left turn signals not working
hi
the action which you took were correct.
try checking the wire which is going to the bulb.check for the continuity.
2.bulb socket will be there check the connection in it. if there is any lose connections in it the bulb wont work.
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