GMC SIERRA 2001 Owner's Manual

4-59
Tow/haul is designed to be most effective when the
vehicle and trailer combined weight is at least 75% of
the vehicle's Gross Combined Weight Rating (GCWR).
Tow/haul is most useful under the following
driving conditions:

When pulling a heavy trailer or a large or heavy load
through rolling terrain.

When pulling a heavy trailer or a large or heavy load
in stop and go traffic.

When pulling a heavy trailer or a large or heavy load
in busy parking lots where improved low speed
control of the vehicle is desired.
Operating the vehicle in tow/haul when lightly loaded
or with no trailer at all will not cause damage. However,
there is no benefit to the selection of tow/haul when the
vehicle is unloaded. Such a selection when unloaded
may result in unpleasant engine and transmission
driving characteristics and reduced fuel economy.
Tow/haul is recommended only when pulling a
heavy trailer or a large or heavy load.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. The engine
oil cooler is required on C/K
-2500 models with the
VORTEC 6000 engine. Refer to the Trailering Guide
for oil cooler recommendations.

4-60
C-1500 Regular Cab Short Box (2WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
4300 V6 (Auto) 3.08 4,700 lbs. (2 132 kg)
3.42 5,200 lbs. (2 359 kg)
4300 V6 (Manual) 3.08 3,700 lbs. (1 678 kg)
3.42 4,200 lbs. (1 905 kg)
4800 V8 (Auto) 3.42 6,600 lbs. (2 994 kg)
3.73 7,600 lbs. (3 447 kg)
4800 V8 (Manual) 3.42 4,600 lbs. (2 087 kg)
3.73 5,600 lbs. (2 540 kg)
5300 V8 3.42 7,600 lbs. (3 447 kg)
3.73 8,600 lbs. (3 901 kg)C-1500 Extended Cab Short Box (2WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
4300 V6 (Auto) 3.42 4,900 lbs. (2 223 kg)
3.73 5,900 lbs. (2 676 kg)
4300 V6 (Manual) 3.42 3,900 lbs. (1 769 kg)
4800 V8 (Auto) 3.42 6,300 lbs. (2 858 kg)
3.73 7,300 lbs. (3 311 kg)
4800 V8 (Manual) 3.42 4,300 lbs. (1 950 kg)
3.73 5,300 lbs. (2 404 kg)
5300 V8 3.42 7,300 lbs. (3 311 kg)
3.73 8,300 lbs. (3 765 kg)
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,000 lb. (454 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 1,500 lb. (680 kg) maximum.

4-61
C-1500 Crew Cab Short Box (2WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
6000 V8 3.73 8,300 lbs. (3 765 kg)
4.10 10,300 lbs. (4 672 kg)
C
-1500 Regular Cab Long Box (2WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
4300 V6 (Auto) 3.08 4,600 lbs. (2 087 kg)
3.42 5,100 lbs. (2 313 kg)
4300 V6 (Manual) 3.08 3,600 lbs. (1 633 kg)
3.42 4,100 lbs. (1 860 kg)
4800 V8 (Auto) 3.42 6,500 lbs. (2 948 kg)
3.73 7,500 lbs. (3 402 kg)
4800 V8 (Manual) 3.42 4,500 lbs. (2 041 kg)
3.73 5,500 lbs. (2 495 kg)
5300 V8 3.42 7,500 lbs. (3 402 kg)
3.73 8,500 lbs. (3 856 kg)C
-1500 Extended Cab Long Box (2WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
4800 V8 (Auto) 3.42 6,100 lbs. (2 767 kg)
3.73 7,100 lbs. (3 220 kg)
4800 V8 (Manual) 3.42 4,100 lbs. (1 860 kg)
3.73 5,100 lbs. (2 313 kg)
5300 V8 3.42 7,100 lbs. (3 220 kg)
3.73 8,100 lbs. (3 674 kg)
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,000 lb. (454 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 1,500 lb. (680 kg) maximum.

4-62
K-1500 Regular Cab Short Box (4WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
4300 V6 (Auto) 3.42 4,900 lbs. (2 223 kg)
3.73 5,400 lbs. (2 449 kg)
4300 V6 (Manual) 3.42 3,900 lbs. (1 769 kg)
3.73 4,400 lbs. (1 996 kg)
4800 V8 (Auto) 3.73 7,300 lbs. (3 311 kg)
4.10 8,300 lbs. (3 765 kg)
4800 V8 (Manual) 3.73 5,300 lbs. (2 404 kg)
4.10 6,300 lbs. (2 858 kg)
5300 V8 3.73 8,300 lbs. (3 765 kg)
4.10 9,300 lbs. (4 218 kg)K-1500 Extended Cab Short Box (4WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
4800 V8 (Auto) 3.73 7,000 lbs. (3 175 kg)
4.10 8,000 lbs. (3 629 kg)
4800 V8 (Manual) 3.73 5,000 lbs. (2 268 kg)
4.10 6,000 lbs. (2 624 kg)
5300 V8 3.73 8,000 lbs. (3 629 kg)
4.10 9,000 lbs. (4 082 kg)
K
-1500 Crew Cab Short Box (4WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
6000 V8 3.73 8,000 lbs. (3 629 kg)
4.10 10,000 lbs. (4 536 kg)
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,000 lb. (454 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 1,500 lb. (680 kg) maximum.

4-63
K-1500 Regular Cab Long Box (4WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
4300 V6 (Auto) 3.42 4,800 lbs. (2 177 kg)
3.73 5,300 lbs. (2 404 kg)
4300 V6 (Manual) 3.42 3,800 lbs. (1 724 kg)
3.73 4,300 lbs. (1 950 kg)
4800 V8 (Auto) 3.73 7,200 lbs. (3 266 kg)
4.10 8,200 lbs. (3 719 kg)
4800 V8 (Manual) 3.73 5,200 lbs. (2 359 kg)
4.10 6,200 lbs. (2 812 kg)
5300 V8 3.73 8,200 lbs. (3 719 kg)
4.10 9,200 lbs. (4 173 kg)K-1500 Extended Cab Long Box (4WD)*
Engine (Trans.) Axle
RatioMax. Trailer Wt.
4800 V8 (Auto) 3.73 6,800 lbs. (3 084 kg)
4.10 7,800 lbs. (3 538 kg)
4800 V8 (Manual) 3.73 4,800 lbs. (2 177 kg)
4.10 5,800 lbs. (2 631 kg)
5300 V8 3.73 7,800 lbs. (3 538 kg)
4.10 8,800 lbs. (3 992 kg)
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,000 lb. (454 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 1,500 lb. (680 kg) maximum.

4-64
C-2500 (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 3.73 8,800 lbs. (3 992 kg)
4.10 10,800 lbs. (4 899 kg)
C
-2500 Regular Cab Long Box HD (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,600 lbs. (3 402 kg)
8100 V8 3.73 13,900 lbs. (6 311 kg)**
4.10 15,900 lbs. (7 212 kg)**
6600 V8 Diesel 3.73 15,900 lbs. (7 212 kg)**
4.10 15,900 lbs. (7 212 kg)**C
-2500 Extended Cab Short Box HD (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,500 lbs. (4 763 kg)
8100 V8 3.73 13,800 lbs. (6 260 kg)**
4.10 15,800 lbs. (7 167 kg)**
6600 V8 Diesel 3.73 15,700 lbs. (7 121 kg)**
4.10 15,700 lbs. (7 121 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.

4-65
C-2500 Extended Cab Long Box HD (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,200 lbs. (4 627 kg)
8100 V8 3.73 13,400 lbs. (6 078 kg)**
4.10 15,400 lbs. (6 985 kg)**
6600 V8 Diesel 3.73 14,900 lbs. (6 758 kg)**
4.10 14,900 lbs. (6 758 kg)**C-2500 Crew Cab Short Box HD (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,300 lbs. (4 672 kg)
8100 V8 3.73 13,600 lbs. (6 169 kg)**
4.10 15,600 lbs. (7 076 kg)**
6600 V8 Diesel 3.73 15,500 lbs. (7 031 kg)**
4.10 15,500 lbs. (7 031 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.

4-66
C-2500 Crew Cab Long Box HD (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,200 lbs. (4 627 kg)
8100 V8 3.73 13,500 lbs. (6 123 kg)**
4.10 15,500 lbs. (7 031 kg)**
6600 V8 Diesel 3.73 14,900 lbs. (6 758 kg)**
4.10 14,900 lbs. (6 758 kg)**
K
-2500 Extended Cab Short Box (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 3.73 8,300 lbs. (3 765 kg)
4.10 10,300 lbs. (4 672 kg)K
-2500 Extended Cab Short Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,200 lbs. (4 627 kg)
8100 V8 3.73 13,500 lbs. (6 123 kg)**
4.10 15,500 lbs. (7 031 kg)**
6600 V8 Diesel 3.73 15,400 lbs. (6 985 kg)**
4.10 15,400 lbs. (6 985 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.

4-67
K-2500 Regular Cab Long Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,400 lbs. (4 717 kg)
8100 V8 3.73 13,700 lbs. (6 214 kg)**
4.10 15,700 lbs. (7 121 kg)**
6600 V8 Diesel 3.73 15,600 lbs. (7 076 kg)**
4.10 15,600 lbs. (7 076 kg)**K-2500 Extended Cab Long Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,200 lbs. (4 627 kg)
8100 V8 3.73 13,500 lbs. (6 123 kg)**
4.10 15,500 lbs. (7 031 kg)**
6600 V8 Diesel 3.73 15,500 lbs. (7 031 kg)**
4.10 15,500 lbs. (7 031 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.

4-68
K-2500 Crew Cab Short Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,000 lbs. (4 536 kg)
8100 V8 3.73 13,200 lbs. (5 987 kg)**
4.10 15,200 lbs. (6 895 kg)**
6600 V8 Diesel 3.73 15,200 lbs. (6 895 kg)**
4.10 15,200 lbs. (6 895 kg)**K-2500 Crew Cab Long Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 9,900 lbs. (4 491 kg)
8100 V8 3.73 13,200 lbs. (5 987 kg)**
4.10 15,200 lbs. (6 895 kg)**
6600 V8 Diesel 3.73 15,100 lbs. (6 849 kg)**
4.10 15,100 lbs. (6 849 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.