GCW - GVW = Max. GTW

Example:

• 2001 GMC Heavy Duty 2500
• 4 Wheel Drive Extended Cab
• Engine: Duramax 6600
• HorsePower: 300 hp @ 3100 rpm
• Torque: 520 lb. ft @ 1800 rpm
• Transmission: Allison 5 speed automatic
• Axle Ratio 3.73 to 1
• GVW 9,200 lbs
• GCWR: 22,000 lbs
• 22,000 lbs. GCW - 9200 lbs GVW = 12,800 lbs GTW

GCW = Gross Combined Weight Actual weight of tow vehicle and trailer combined
GVW = Actual weight of the vehicle when fully loaded. It is the base curb weight plus the cargo weight.
GTW = The weight of the trailer fully loaded.