The -10 User manual is clear...;
The A2 CTIS variant is "Supposed" to air up to NINETY PSI in Hwy Mode.
So every time you start the truck the truck reverts back to HWY MODE
and your tires should be at 90 PSI.
The tires are marked by the Manufacturer at 100PSI COLD I think.
Anything under these pressures for on road driving is not what the
OE engineers want. Running under design pressure will create wear
patterns and heat.
"Your mileage may vary".
There are exceptions to all rules, case and point, if you read the TM
for an M916 it tells you to air down to 50PSI in stock 11:00R24 sneakers
if you are running bobtail. But when you think about that, you realize
you have EIGHT massive tires back there, duals x 4 so you can see
it would be fine.
Run at what the TM mandates and force an attorney whom might come
after you in a wreck, looking for negligence, to pound sand...