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All of the above is good information.

However, The problem I have with the Passenger-side approach, which they are doing more and more around here.

My Truck doesn't have power windows or locks, and I have a whole mess of electronics between me and the passenger seat. (Laptop Mount, Ham Radio Mount, phone mounts, etc)
There is really No Way for me to lower the window on the passenger side without unbuckling, crawling completely around my cab, and pretty much sitting there first.

So if he wants to talk to me, he's going to have to come to my drivers side window, which I will gladly lower, manually with the crank, to speak with him.

Ya know, that's a good question, and I have no answers.

In the drivers seat, you can do a whole lot of things that could be bad news for the LEO, reach somewhere, grab something, or simply Drive off.
Standing outside your vehicle, hands in the open, does seem to be more 'visible' at least at first glance...

Perhaps one of the Current/Former LEO's on this forum can explain.