2001 Buick Regal Blinker

If the vehicle is idling in the driveway, tranny in park or neutral, if you activate the turn signal, with the steering pointed straight ahead, it dies? Can you restart with the turn signal activated? If not, just do some basic tests, like check for spark at the plugs and injector pulse, with the engine cranking, and the turn signal activated.

You might have the battery and charging system checked, make sure cables and wires are clean and tight on both ends. Some of the national brand autostores will do some checks for free and check for any trouble codes.

I can't tell you the problem without doing some testing.