One of these statements is on your GVW Rating label. Here is what each one means.

TRUCK SERVICE: A vehicle made to carry property or special equipment. It is made for uniform frame loading. That includes using the vehicle to pull a full trailer.

TRUCK-TRACTOR: A vehicle made to draw other vehicles. It is made to carry part of the load of the trailer. It is made for point frame loading, usually for a semi-trailer (fifth-wheel).

MAX. VERT. CG: The highest allowable vertical center of gravity, at the highest allowable GVWR. It is measured from the level ground in inches.

TRUCK-CANADA: A vehicle first sold in Canada with a non-school bus application, or cab models with regular production option RQ2 (truck service).

TRACTOR-CANADA: A cab model first sold in Canada with regular production option RQ3 (truck-tractor service).