Just take one off and look at the backside of the wheel. It should have the max tire pressure cast onto one of the spokes. I wouldn't take a chance unless you know for sure. Running too much pressure on a wheel not rated for it can split the rim.
2015 Chev Silverado 3500 dually D/A
2016 Cedar Creek 36CK
B&W Patriot 18K, Trail-Aire pinbox,
Level up, dual panes & all that stuff...