GMC 2004 Sierra 1500 Pickup Owner's Manual page 375

Vehicle*
K-1500 Extended Cab Long Box (4WD)*
4800 V8
4800 V8 (Manual)
5300 V8
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 1,500 lbs. (680 kg)
maximum.
**Maximum weight 6,800 lbs (3 084 kg) for fifth-wheel and gooseneck.
Vehicle*
C-2500 LD (2WD)*
6000 V8
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 2,500 lbs.
(1 133 kg) maximum.
Axle Ratio Maximum Trailer Weight
3.73 6,600 lbs. (2 993 kg)
4.10 7,600 lbs. (3 447 kg)**
3.73 4,700 lbs. (2 133 kg).
4.10 5,700 lbs. (2 587 kg)
3.73 7,600 lbs. (3 447 kg)**
4.10 8,600 lbs. (3 900 kg)**
Axle Ratio Maximum Trailer Weight
3.73 8,700 lbs. (3 946 kg)
4.10 10,700 lbs. (4 853 kg)
GCWR
12,000 lbs. (5 443 kg)
13,000 lbs. (5 897 kg)
10,000 lbs. (4 536 kg)
11,000 lbs. (4 990 kg)
13,000 lbs. (5 897 kg)
14,000 lbs. (6 350 kg)
GCWR
14,000 lbs. (6 356 kg)
16,000 lbs. (7 264 kg)
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