You need to read the owners manual. You can set the car up to lock automatically too :nerd:
Use the 10 inch infotainment screen and go into Vehicle and then into remote lock/unlock/start and then into the passive door lock. Turn it on with chirp and the car will lock itself every-time after the doors are closed with a short delay. The horn will chirp to notify you that it's locked.

You can also set the locks to unlock when the car is put into park and you won't need to flip the door handle twice to get out. You really should read the manual to help be less confused.

 

Here's a few image of the screen you'll need to access.

 

Why are you using the lock button on the door at all?

1. turn off car
2. (if needed, press 'unlock' button on door, then) get out
3. close all doors
4. push the 'lock' button on key-fob
5. walk away

 

cos I prefer not to take key out of my pocket, hence using the exterior door buttons.

But, I have read the responses on setting up auto lock. Will do that

 

A lot us find it more convenient to not have to fish our keys out of our pockets or purse to unlock or lock the car.

I've even gotten to the point of using the passive door-lock feature. Remove all keys from car, close door, ~5 seconds later, car automatically locks itself.

 

I've even gotten to the point of using the passive door-lock feature. Remove all keys from car, close door, ~5 seconds later, car automatically locks itself.

This is all I have ever done. I turn the car off, the doors unlock, I open the door, get out, close the door, and walk away. The doors lock on their own.

 

The only downside to not using the remote is that believe the charge cord theft alert is only armed/disarmed with the RKE transmitter (pg. 233 in the manual).

I use it every night since I'm using 120V cord on my driveway. I've forgotten to disarm it a couple of times when I unlocked the door with the button push and unplugged the charge cable, which triggered the alarm, you get a possible OnStar theft alert along with the horn honk and light flash about 10 seconds after you unplug.

 

I have adjusted the settings to use auto door lock function several times. It works for awhile then resets to default. I don’t know if I’m doing something or it does it by itself as a glitch of some kind. Any ideas?

 

Low voltage 12 Volt DC battery ? Mine has had zero issue's.
What is the production date on your door label.

 

Push the button on the outside it looks the doors, what is the big deal.

 

I think I agree with this note.
I don't want to have auto lock, because in/at my own home, I don't want to have to carry around a key fob to just open a door.
When I am away from home, I either hit the lock button on the inside of the driver door (with door open), or I wait for all doors to close and hit any of the door handle buttons.
I can understand the beauty of auto lock, but I think this is also tremendously simple. What am I missing?

 

I was really excited about this feature when I learned of it.
I used it for a day or two then began to get frustrated when it was auto locking in my garage.
out in the world, I like it - but I park every night and any time at home in the garage - prefer to leave it unlocked there...

 

I have the 2020 bolt and it is very annoying. I have to do the same thing you are doing.

 

But my doors never lock when I get out; I can press "lock" on the key but then when I push the button on the door, it unlocks. So anyone can do that who wants to break into my car!

 

The door will only unlock by pushing the button on the handle when the fob is nearby. So, no, not anyone who is walking by can unlock the door.