Would the DMV possibly be talking about the class? As in 1/2 ton and 3/4 ton trucks. The f150 is a 1/2 ton truck, the f250 is a 3/4 ton truck and so on.
Yes you will register the truck as a passenger vehicle.
'07 Chevy 2500HD
2010 John Deere Z925A 54" MOD
2011 John Deere Quik Trak 647A
John Deere walkbehind