GMC 2004 Sierra - Manual (Page 369)

Weight of the Trailer
How heavy can a trailer safely be?
It depends on how you plan to use your rig. For
example, speed, altitude, road grades, outside
temperature and how much your vehicle is used to pull
a trailer are all important. And, it can also depend
on any special equipment that you have on your vehicle.
Use one of the following charts to determine how
much your vehicle can weigh, based upon your vehicle
model and options.
Maximum trailer weight is calculated assuming the
driver and one passenger are in the tow vehicle and it
has all the required trailering equipment. The weight
of additional optional equipment, passengers and cargo
in the tow vehicle must be subtracted from the
maximum trailer weight.
Above the 5,000 lbs. (2 268 kg) trailer rating, the
handling/trailering suspension is required on
C-1500 models and the handling/trailering or off-road
suspension is required on K-1500 models.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-1500 Regular Cab Short Box (2WD)*
4300 V6 (Auto)
3.08
3.42
4,600 lbs. (2 087kg)
5,100 lbs. (2 313kg) 9,000 lbs. (4 082 kg)
9,500 lbs. (4 309 kg)
4300 V6 (Manual)
3.08
3.42 3,600 lbs. (1 633 kg)
4,100 lbs. (1 860 kg) 8,000 lbs. (3 628 kg)
8,500 lbs. (3 855 kg)
4800 V8 (Auto)
3.42
3.73 6,500 lbs. (2 948 kg)
7,500 lbs. (3 401 kg) 11,000 lbs. (4 994 kg)
12,000 lbs. (5 443 kg)
4800 V8 (Manual)
3.42
3.73 4,500 lbs. (2 041 kg)
5,500 lbs. (2 495 kg) 9,000 lbs. (4 082 kg)
10,000 lbs. (4 535 kg)
5300 V8
3.42
3.73 7,500 lbs. (3 401 kg)
8,500 lbs. (3 855 kg) 12,000 lbs. (5 443 kg)
13,000 lbs. (5 897 kg)
* Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 lbs. (680 kg)
maximum.
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