Service Stabilitrak meesage in DIC and Brake light stays illuminated

[1Bad16Silverado]

Over the last week or so, my "service stabilitrak" turned on along with the red "brake" light on the dash. Sometimes when turning left at low speeds (a little faster than idle), the front driver side caliper would catch the rotor. Something wasn't right. I deemed this as a major safety concern, as I don't want a caliper locking up a tire while I'm driving down the road. I took it to the dealership to have it checked out. 31k miles, most parts are still under the warranty. The dealership service says that the lights are turning on and disabling my stabilitrak due to my rear O2 sensor delete (tuned). This is bullshit, and why I'm not a fan of dealerships. He then tells me there is a code in history that shows the front left wheel speed sensor had an issue, but it was in history and not a concern. To me, this was a concern. I change the wheel speed censor out, $30 and 30 minutes of my time. Pull the negative cable to reset things. Replace cable. Drive a little. Light returns. Change the front brake pads. Thinking maybe they are worn and allowing the piston of the caliper to get stuck. Pull the negative cable. Replace cable. Drive a little. Light returns. Now I'm pissed.

 

In the end, it was the steering wheel position censor. The connection was fretting (losing contact between contacts. I removed the harness. Sprayed it with contact cleaner from an electronics store. Put it back together. All problems resolved.

 

 

 

 

I also went ahead and did the connector for the brake pedal sensor while I was under the dash.

 

[1Bad16Silverado]

Well, this "fix" was merely temporary, as the issue returned.

 

Upon the return of the lights, I replaced the PCV valve, as a different dealership rep told me it may be in my emissions equipment. As the first dealership blamed the lights on the rear O2 sensors being deleted, I figured this may be it.

 

I recently went for an oil change at the same dealership, as I purchased one of the extended oil change plans (it was dumb of me to do). In casual conversation with another service advisor, he mentioned a brake fluid sensor code that came on. I'd never heard of this, simply because I've never messed with a master cylinder before (never had a need). This sparked my curiosity on what exactly this sensor was. Popped the hood, and boom, there it was. What I thought was going to be my nemesis, the sensor. I went to touch it, and the wires just fell out.

 

 

The way it is supposed to look:

 

 

How did this sensor wire clip break? When I took it to the same dealership that I purchased the oil package from. and they replaced the brake booster.