Toyota Tacoma 2012 Owner's Manual page 214

2-5. Driving information
Towing related terms
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GCWR (Gross Combination Weight Rating)
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GVWR (Gross Vehicle Weight Rating)
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GAWR (Gross Axle Weight Rating)
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The maximum allowable gross
combination weight. The gross
combination weight is the sum of
the total vehicle weight (including
the occupants, cargo and any
optional equipment installed on
the vehicle) and the weight of the
trailer being towed (including the
cargo in the trailer).
The maximum allowable gross
vehicle weight. The gross vehicle
weight is the total weight of the
vehicle. When towing a trailer, it
is the sum of the vehicle weight
(including the occupants, cargo
and any optional equipment
installed on the vehicle) and the
tongue weight.
The maximum allowable gross
axle weight. The gross axle
weight is the load placed on
each axle (front and rear).