Is there a torque spec. for body mount bolts?

Wondering if anyone can tell me whether or not there is a specified torque for body mount bolts. I just took the nerf bars off my '99 Sierra 4WD 3DR 5.3L this past weekend. It required the removal and reinstall of 4 of the body/frame mount bolts. Now if the body twists or anything, such as turning off of the street into a somewhat steep driveway , the mounts make noise, as if they are not tight. I couldn't find anything in my Hayne's manual regarding this, nor online. Any help would be appreciated. Thanks.

I just put nerf bars on my 04 Sierra and the company said to torgue them at 45 ft. lbs. I don't know if thats to spec or not. Hope it helps