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hturnerfamily

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There are several differences in discussions and situations about what happens when you 'open the driver door', whether in Forward, or Reverse:

A) If START the truck WITH the driver door open, or you open the driver door before you put the truck into gear, you can certainly and easily put the truck in GEAR and move forward or backward without issue... there is no safety measure in place here, since you already have the door open...

B) If you open the driver door WHILE IN GEAR, but not moving, AND your foot IS on the brake, the truck WILL immediately move the shifter into PARK. The gear shifter will move automatically into place. This is really the simple SAFETY measure to not allow someone to accidentally 'think' they are already in Park, especially when 'AUTO HOLD' is in play, and then open the door...

C) If you open the driver door, though, WHILE IN GEAR, and moving, and your foot is NOT on the brake, the truck will CONTINUE to drive IF you are already above a low speed, but it WILL make a lot of 'parking prawl' clicking noises as it tries does so - it is probably not going to suddenly slam on the brakes and put itself into park, though.
If, though, you are slow enough, such as with backing, It WILL brake the truck, suddenly, and with a rocking motion, and also put the gear shifter into PARK ... This is probably less than 2-3 mph, but testing might reveal a better number... if you are brave. This is the safety measure it is designed to employ.
The only real way to 'disable' this sudden action is to ALREADY HAVE THE DRIVER DOOR OPEN before you put the truck into gear, whether forward or reverse.

Yes, many of us growing up with older vehicles without these safety features are certainly used to how to handle the times we need to open the door while in gear and while moving, but the 'higher ups', whether in government regulation, or at the manufacturer, are going to side with more safety.
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TaxmanHog

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IIRC, the seatbelt engaged also inhibits autopark when door is open, not sure If you have enough slack in the shoulder harness to swing your head out of the door opening to eyeball your positioning......

Why is it a problem to just use your sideview mirrors and backup cameras to position truck to trailer?

BTW ... why the divergence from post 1 concern, you guys are going far afield.
 

TMND

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Conversations change as they happen lol. My reason for keeping the door open when hooking up a trailer is I like to get in and out of the truck multiple times making sure I lined up perfectly and don’t like opening and closing the door. Old habit from not having cameras, but also I can’t accurately gauge depth with these cameras, down to inches at least. Many times hooking up I think I’m centered on it and have to come back another inch or so.
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