Originally Posted by Dave
That sounds about right. I never actually torque mine. Just tighten them with my air impact. And then give em another bump with it in about 100mi. But they have never loosened up on me
I'd NEVER use an impact wrench to final tighten the nuts. The torque produced by an impact is extremely unpredictable. Too loose and your lug nuts fall off. Too tight and you'll stretch the lug studs and the lug nuts will fall off. If you have torque sticks they work ok. Lazy garage mechanics get away with it, but good ones will final torque with a torque wrench.
Use a torque wrench. We're talking about a work truck with serious loads and serious consequences. Someone with the right FSM please provide him a good torque number.
Truck owners get anal retentive about a lot of things, many of them hardly matter in the end. But this is one that is seriously important enough to adhere to.