If you need a law enforcement officer to ticket you in order to ensure you're loading your truck safely, I don't really know what to say.
A LEO will not cannot ticket anyone for carrying weight above the truck makers GVWR. The reason he cannot is their are no state/fed overweight codes for exceeding the truck makers GVWR.
I've got several states size and weight codes for vehicle weights. Their all worded differently but point in the same direction as this one; ..used for example only...
(c) Gross weight.--No vehicle or combination shall be driven
with a gross weight in excess of the sum of the allowable axle
weights as set forth in this section, nor shall any vehicle or
combination be driven with a gross weight in excess of the sum
of the manufacturer's rated axle capacities.**
Sorry OP for the weight hijack.