Kinda stuck in park? Once unplugged it’ll work?

[dS7R]

Good evening,

So I have a 2013 Tahoe SSV with now about 129k miles. I’ve recently ran into a problem I thought would be an easy fix, but isn’t? I’m hoping I’m missing something you guys could help?!

I’m currently kinda stuck in park, after hitting and playing with the brake a bunch I can get finally get it out of park and into any gear and shifts through out gears prefect.

But I found when I unplug the Brake Pedal Position Sensor it’ll go into any gear prefect (won’t get stuck at all) soon as I plug it back in, stuck in park again.

So like any normal person I replaced the Brake Pedal Position Sensor with a new one and resettled the ECU ( took the battery off) but it didn’t work. I’m still Stuck in park for the most part, unless I again unplug the Brake Pedal Position Sensor. Which causes like 3 warning lights. Or don’t unplug it and press on the brake pedal 20 times and eventually get it in gear

Not sure what to do, am I missing something simple? Any help is greatly appreciated!

P.s. - all Brake lights are working.
- Haven’t had a trailer ever attached

 

[RooTBeeRthe1st]

I'm not sure how that system works, but yeah you would think it would just be the brake switch.
However, since you changed that, maybe the system needs to see a certain amount of brake pressure that is not getting/reading for some reason.
Or perhaps some faulty wiring, potentially blown fuse.
Hopefully someone that actually knows the system can chime in instead of just my random guessing. Haha