I don't see adaptive cruise being a feature most WT owners are looking for if they use the truck for business...could be wrong.
All the fleet trucks at my work are starting to come with these features now as it's not any cheaper to get them without. (FORD)
The biggest difference between the 18" and 20" tires is side wall, weight and truck configuration. I would also guess the wheels themselves dictate differences in towing/payload limits.
You will be fine until you can replace them. Never seen a spare match tread depth of the other tires unless you are doing a 5 tire rotation, not really a thing on a dually.
BFG is has the KO3s now, I am running Toyo ATIII's and tow 16K with them no issues.
I have noticed this on my 2024 3500. Its very faint, doesn't do it all the time. I can only really feel in the seat of my pants. I can think I have have only noticed it maybe 4 or 5 times in 6000 miles.
One of the biggest advantages of a Dually for sure, I have had some good crosswinds in New Mexico and Texas and never got any sway that as noticeable. I would always look to see what the trailer was doing and it was tracking straight always.
I think the issue with the Primacy tires are exclusive to the 2024 Dually having the the first year for a 235x80x18.
For some reason it seems the manufacturing of this particular size is off perhaps...
Fuel Wheels 20"
Toyo ATIII 295x60x20
I uave had 3 GM duallys trucks with the 18" primacy....all had wobbles at freeway speeds, road force helped on some and others a little.
The OEM NAV is Google maps, so the answer to your questions is no - its not a function supported by Google. I wouldn't invest much time in the OEM NAV unless you will continue to pay for it after your trial.
I have a 40 foot trailer and it has worked flawless. As long as your last axle is not more than 23 feet from the receiver it should be ok.
From the owners manual:
"The trailer tire pressure sensors can transmit
up to 7 m (23 feet) from the hitch receiver of
the vehicle.
A trailer must be electrically connected to
the vehicle before starting the
sensor-to-vehicle learn process."
On uphill climbs I try to keep with the flow of the left lane traffic and not get caught behind the semis who are crawling up the grades and lose momentum.
Generally most people let me over or there's enough gap in the traffic I can get over no problems, I them move back over in the right lane. I have not looked to see what gear I am in, but its usually around 60-65 mph and the truck holds that no problem.