I appreciate the various posts, and hope people will consider the door decals and manuals are great for basic information, but also realize there is more to the data than what is on the decal. If you do not have the time or interest to do the research, I really do not think you can go wrong using the decal/manual information. If you find your rig is over the decal/manual, a little research might relieve you of your concerns, or provide methods to upgrade your rig.
I am a member of the Tire load Police, which I guess could be called an division of the Weight Police. Why tire load, if one fails, it can literally put your vehicle on the ground with possible serious consequences. To my knowledge, all vehicle decals have the weight issues with the tire size and PSI as equipped from the manufacture. If you do not upgrade your tires, I strongly suggest you stay with the decal/manual.
Wayne