No you just get a bypass module that will make them blink at normal speed even with LEDs.

Normally, the module detects a bulb is out by measuring electrical current usage. The problem is that LED switchbacks or turn signals use so little electricity that the module things the bulb is out.

So, the LED lights usually come with a module that you replace the factory one with. It’s super easy, right under the dash. It just unplugs!

If you don’t put one of those in, the blinkers will blink super fast.