2003 GMC Sierra 1500 Pickup Owner's Manual - Page 353

Vehicle* Axle Ratio Maximum Trailer Weight GCWR C-1500 Extended Cab Long Box (2WD)* 3.42 5,900 Ibs. (2 676 kg) 11,000 Ibs. (4 994 kg) 4800 V8 (Auto) 3.73 6,900 Ibs. (3 129 kg) 12,000 Ibs. (5 448 kg) 3.42 3,900 Ibs. (1 769 kg) 9,000 Ibs. (4 086 kg) 4800 V8 (Manual) 3.73 4,900. (2 222 kg) 10,000 Ibs. (4 540 kg) 3.42 6,900 Ibs. (3 129 kg) 12,000 Ibs. (5 448 kg) 5300 V8 3.73 7,900 Ibs. (3 583 kg) 13,000 Ibs. (5 902 kg) * Tongue weight should be 10 percent to 15 percent of trailer weight up to 1,000 Ibs (454 kg). Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 Ibs. (680 kg) maximum. I I I 4-72