GMC Duramax Diesel 2015 Owner's Manual page 66

Use the following chart to determine how much the vehicle can weigh, based upon your vehicle model and options.
Vehicle
C-2500 Pickup Models
Pickup Model Double Cab
1
Standard Box
Pickup Model Crew Cab Standard
1
Box
Pickup Model Regular Cab Long
Box 1
Pickup Model Double Cab Long
Box 1
Pickup Model Crew Cab Long
1
Box
K-2500 Pickup Models
Pickup Model Double Cab
Standard Box 1
Pickup Model Crew Cab Standard
Box 1
Pickup Model Regular Cab Long
Box 1
Axle Ratio
2WD
3.73
3.73
3.73
3.73
3.73
4WD
3.73
3.73
3.73
Driving and Operating
Max. Trailer Wt. 8
7 983 kg (17,600 lb)
7 893 kg (17,400 lb)
8 119 kg (17,900 lb)
7 938 kg (17,500 lb)
7 847 kg (17,300 lb)
7 847 kg (17,300 lb)
7 757 kg (17,100 lb)
7 983 kg (17,600 lb)
9-39
GCWR *
11 113 kg (24,500 lb)
11 113 kg (24,500 lb)
11 113 kg (24,500 lb)
11 113 kg (24,500 lb)
11 113 kg (24,500 lb)
11 113 kg (24,500 lb)
11 113 kg (24,500 lb)
11 113 kg (24,500 lb)