My right turn signal is flashing very fast. I did replace the bulb on 2002 GMC Envoy

The bulb that was burned out was replaced witht the same type of bulb but is still flashing very fast.

1 answer 1 comment
IS ALL THE LIGHTS STILL BLINKING IF YES, CHECK PINS INSIDE LIGHT BULB SOCKET..YOU MIGHT HAVE TO CLEAN THE PINS..
Thank-you. I'm not a mechanic-changed the bulb myself-but what are the pins? And how do I clean them?