In a 91 Chevy silverado is the turn signal flasher different from the 4 way flasher?

I own an 89, so they should be set up the same. There are two separate flashers for the 4ways and turn signals. The 4way flasher shoud be clipped under the dash on the driver side and the turn signal flasher is plugged in under the dash on the firewall, also on the driver side.