Chevrolet 2012 Suburban Owner's Manual page 370

9-92 Driving and Operating
Front axle reserve capacity is the
difference between the front Gross
Axle Weight Rating (GAWR) and the
front axle weight of the vehicle with
full fuel and passengers. Basically, it
is the amount of weight that can be
added to the front axle before
reaching the front GAWR.
The front axle reserve capacity for
the vehicle can be found in the
lower right corner of the
Certification/Tire label, as shown.
United States
Canada
I n f o r ma t i o n P r o v i d e d b y :
In order to calculate the amount of
weight any front accessory, such as
a snow plow, is adding to the front
axle, use the following formula:
(W x (A + W.B.)) /W.B.= Weight the
accessory is adding to the
front axle.
Where:
W = Weight of added accessory
A = Distance that the accessory
is in front of the front axle
W.B. = Vehicle Wheelbase