So I reached out to ZAutomotive about the park sense issue to get an idea of what size tire is too big before you start losing the oem park features. They said the highest tire size is 33.34" without having any issues with park sense. That doesn't mean you can't go higher and still keep full functions but they said each truck and year varies so that is the safe number.
I just installed the TazerDT last night and set it to 33.34" even though my tires are closer to 34.5" but wanted to see how close speed was. I was off 3mph at 80MPH which is livable but I may still play around with getting it closer and identify what tire size my parksense stops working. The plug in kit will fix this but trying to avoid more cost if I dont need it.
Also, I'm pretty sure the park sense feature is just the chime alerting your close to something (front/rear). I have 360 camera so If I'm relying on a chime to prevent me from hitting something, I shouldn't be on the road to begin with haha.
Love my amber running lights, auto power folding mirrors, and the 3 honk kill! Definitely worth the buy!