Where is the turn signal flasher on a 2004 Impala?

The turn signal flasher on a 2004 Impala is located in the underhood fuse block, which is located in the engine compartment on the passenger side. To access it, open the hood and look for a black plastic box with a red cover; this is the fuse box. Inside the fuse block, you should find a relay labeled "Turn Signal Flasher" or "Hazard Flasher."