HELP! 92 LUMINA TURN SIGNALS....

I have a 1992 Chevy Lumina. I replaced a turn signal/turn signal/brake light bulb (3057) and now my turn signals will not work......coincedence?..They come on but do not flash. I checked both possible fuses in the glove box and both are good. ALL LIGHTS WORK...including emergency flashers,tail lights,brake lights. In my old 74 chevy there was a emergency flasher link and a turn signal link which were both silver 2 prong relays?and were on the fuse panel under the dash. I am not too up to date on these newer GM cars. Any help would be appreciated!