GMC 2006 Sierra - Manual (Page 390)

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Extended Cab Short Box HD (4WD)*
6000 V8
4.10 10,000 lbs (4 536 kg) 16,000 lbs (7 257 kg)
8100 V8
3.73
4.10 12,000 lbs (5 443 kg)
12,000 lbs (5 443 kg) 20,000 lbs (9 072 kg)
22,000 lbs (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs (5 443 kg) 22,000 lbs (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up
to 3,000 lbs (1 361 kg) maximum.
Fifth-wheel or gooseneck GCWR for 6.6L V8 Diesel 2500 HD series models is 23,200 lbs (10 523 kg).
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Extended Cab Long Box HD (4WD)*
6000 V8
4.10 9,900 lbs (4 490 kg) 16,000 lbs (7 257 kg)
8100 V8
3.73
4.10 12,000 lbs (5 443 kg)
12,000 lbs (5 443 kg) 20,000 lbs (9 072 kg)
22,000 lbs (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs (5 443 kg) 22,000 lbs (9 979 kg)
K-2500 Crew Cab Short Box HD (4WD)*
6000 V8
4.10 9,800 lbs (4 445 kg) 16,000 lbs (7 257 kg)
8100 V8
3.73
4.10 12,000 lbs (5 443 kg)
12,000 lbs (5 443 kg) 20,000 lbs (9 072 kg)
22,000 lbs (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs (5 443 kg) 22,000 lbs (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up
to 3,000 lbs (1 361 kg) maximum.
4-78