My 2023 Sierra AT4 shifts into park when a door is opened when traveling at low speeds. ( I havn't tried it at speeds over a walking speed)
Is there a way to shut this feature off? When driving around the farm at low speeds a door often gets opened a little early and it would be nice to turn this feature off.

I can't find a way in your owner'* manual. Maaaaaybe a dealership could program it to not do that? I doubt they are allowed to though. From what I've read, you might be able to get the same effect by shifting to Neutral ahead of time, then shift to park when you come to a complete stop. The manual only describes doing this for "car wash mode" where it assumes you will be stopped while doing this. I don't know what it is programmed to do if you start the sequence while moving.

Taking this a step further: What is it programmed to do at highway speeds when that door sensor goes bad and improperly reports that the door has been opened?!?

Ford had a bazillion F-150s that would suddenly try to shift to 1st at highway speeds when a VSS went bad. Would this truck shift to Park? It probably wouldn't lock the driven tires like at low speed, but it might remove a bunch of metal from the park pawl and gear and send it through the transmission.

There are some things they design where I wonder what the use case is. This is one of them. Perhaps there was a rash of people opening their doors while the vehicle is in motion, then they fell out and the vehicle kept going . . . ? If so, I haven't heard of it.

Personally, knowing that it has this logic built in, I'd demand an answer from the dealership (or maybe corporate) to how it behaves at other speeds if the door sensor improperly reports a door open. Maybe this is the case you make to get them to turn this "feature" off.

Thanks for the input CatherdralCub. I will reach out to the dealer and report back.

Cool, thanks!

I'm very curious how this turns out. Undocumented "features" are pretty rare, but they seem to be popping up slightly more often lately.

The dealer told me it wouldn't shift into park at high speeds. I got the sense they didn't really look into it.
I did a little trial and error and did find out that if the seatbelt is buckled the vehicle will not shift into park when the door is opened so there is a work around there.

Thanks for the followup!

I had an idea: What if you buckle in a very short extension? Then the computer would think the seatbelt is buckled even when you are unbuckled for that last 5MPH or whatever . . . and you could still buckle up the rest of the time.

That was my thinking. I'm shoppint around for extensions now