Manual Transmission - white plunger

What is the white plunger attached to the clutch pedal? Looks like it sends a signal when the clutch is not pressed. Also, looking to get my ls7 to finally disengage, I screwed the white plunger out a little, the MC shaft therefore allowed more travel, now the clutch feels a little better, guess I need to do the adjustable mod on it...

Sounds like the Clutch Switch..little 4 Pin Connector on it?

Yea, not real little though, whats its true function?

Let the PCM know when the Clutch Pedal is being pushed in so the Idle Can be adjusted and the Cruise can be disengaged, as well as anything else that it needs to do.

I figured it out, the white one is for the speed control, lets the pcm know when you push in the clutch, black one is when the clutch is fully depressed. It has really helped the clutch feel unscrewing the white one about halfway. About to start the adjust MC mod...

The black one is the Neutral Safety Switch.