G- 20 curb weight?

I have a 93 G-20. I bought it used and don't have any papers telling me it's curb weight. I'm guessing 4000-4800lbs. I need the infor inorder to buy commercial plates. Anybody know?

Thanks,
CWF

Google is your friend.
www.nhtsa.dot.gov/cars/rules/regrev/evaluate/pdf/809662.pdf

Page 328