GMC 2001 Sierra 1500 Pickup Owner's Manual page 292

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K 3500 Extended Cab (4WD)*
Engine Axle
Ratio
6000 V8 4.10
8100 V8 4.10
6600 V8 Diesel 3.73
4.10
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* Weight distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
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Fifth wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
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** Fifth wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.
4-70
Max. Trailer Wt.
9,800 lbs. (4 445 kg)
15,100 lbs. (6 849 kg)**
14,800 lbs. (6 713 kg)**
14,800 lbs. (6 713 kg)**
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K 3500 Crew Cab (4WD)*
Engine Axle
Ratio
6000 V8 4.10
8100 V8 4.10
6600 V8 Diesel 3.73
4.10
Max. Trailer Wt.
9,800 lbs. (4 445 kg)
15,100 lbs. (6 849 kg)**
15,200 lbs. (6 895 kg)**
15,200 lbs. (6 895 kg)**