Rims with riveted center sections that were designed for use with tube type tires can develop seep leaks at the rivet holes. I'd suggest mounting and inflating the tubeless tires, and using a spritz bottle and some soapy water to check the rivets for leaks before installing the wheels on the truck. I've seen small air leaks sealed up by bead blasting the inside of the wheels and giving them a heavy coat of epoxy-based paint.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!