GMC 2004 Sierra 1500 Pickup Owner's Manual page 374

Vehicle*
K-1500 Regular Cab Long Box (4WD)*
4300 V6 (Auto)
4300 V6 (Manual)
4800 V8 (Auto)
4800 V8 (Manual)
5300 V8
*Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 lbs. (680 kg)
maximum.
**Maximum weight 8,900 lbs. (4 036 kg) for fifth-wheel and gooseneck.
4-78
Axle Ratio Maximum Trailer Weight
3.42 4,600 lbs. (2 086 kg)
3.73 5,100 lbs. (2 313 kg)
3.42 3,600 lbs. (1 632 kg)
3.73 4,100 lbs. (1 859 kg)
3.73 7,000 lbs. (3 175 kg)
4.10 8,000 lbs. (3 628 kg)
3.73 5,000 lbs. (2 267 kg)
4.10 6,000 lbs. (2 721 kg)
3.73 8,000 lbs. (3 628 kg)
4.10 9,000 lbs. (4 082 kg)**
GCWR
9,500 lbs. (4 309 kg)
10,000 lbs. (4 536 kg)
8,500 lbs. (3 855 kg)
9,000 lbs. (4 082 kg)
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)