1) It could be a loose, broken, or corroded wire(s).
or
2) It could be an Aftermarket Remote start or Auto alarm.
The door lock relay is the culprit. where it is I have not a clue so far.
In the industry, there are mainly two types of twist locks used: manual twist locks and automatic twist locks. Manual twist locks require manual operation to secure containers, while automatic twist locks use sensors and mechanisms to lock containers in place automatically.
causing a serious accident while driving
My 2007 overheated and the engine shut down automatically - while I was driving
Your transmission might automatically shift out of overdrive while driving on the interstate because of low transmission fluid. This issue might also occur because of a bad transmission sensor or overdrive sensor.
it might be a safety thing
In your Chevy, the doors automatically lock when you turn the key to enhance security and prevent theft. This feature is typically part of the vehicle's central locking system, which is designed to engage the locks when the ignition is activated. It ensures that the doors remain secure while the vehicle is in motion. Additionally, some models have a safety feature that locks the doors to protect occupants during driving.
Some cars have lights that turn on lights automatically due to outside brightness
Make sure you lock all of the doors and hope for the best.
its possible that the maxima has a safety device that will automatically lock the doors when it reaches a certain speed it should lock all the doors though
I don't think you can, unless you disable the whole electronic locking/unlocking system. It's a safety feature on many cars; once they hit about 15mph, the doors lock. (Just curious; why is this a problem for you? Makes it harder to push someone out at 50mph?)
its 4th gear in an automatic. its used to cut down on gas usage while driving on the highway or just every day driving. it should automatically engage when in D4 on the shift column.