'91 S-10 GVW vs GVRW

I have a '91 S-10, and it still runs well. I do not however, have the weight specs on the truck. It has the V-6 in the 6'bed w/5-speed.
I am concerned about how much weight I can carry in it, without damaging it.
Can anyone direct me to a source for such info. It is no longer visible on the door panel.
Thank you.