GMC SIERRA 2006 Owner's Manual
Manufacturer: GMC, Model Year: 2006, Model line: SIERRA, Model: GMC SIERRA 2006Pages: 600, PDF Size: 3.49 MB
Page 391 of 600

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Crew Cab Long Box HD (4WD)
6000 V8 4.10 9,700 lbs (4 400 kg) 16,000 lbs (7 257 kg)
8100 V83.73
4.1012,000 lbs (5 443 kg)
12,000 lbs (5 443 kg)20,000 lbs (9 072 kg)
22,000 lbs (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs (5 443 kg) 22,000 lbs (9 979 kg)
* Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs
(1 361 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-3500 Extended Cab (2WD)
6000 V8 4.10 9,700 lbs (4 400 kg) 16,000 lbs (7 257 kg)
8100 V8 4.10 12,000 lbs (5 543 kg)** 22,000 lbs (9 979 kg)
6.6L V8 Diesel (Manual) 3.73 12,000 lbs (5 543 kg)** 23,500 lbs (10 659 kg)
6.6L V8 Diesel (Auto) 3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 kg)
C-3500 Crew Cab (2WD)*
6000 V8 4.10 9,500 lbs (4 309 kg) 16,000 lbs (7 257 kg)
8100 V8 4.10 12,000 lbs (5 443 kg)** 22,000 lbs (9 979 kg)
6.6L V8 Diesel (Manual) 3.73 12,000 lbs (5 443 kg)** 23,500 lbs (10 659 kg)
6.6L V8 Diesel (Auto) 3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up
to 3,500 lbs (1 587 kg) maximum.
** Limited to 12,000 lbs (5 443 kg) with weight distributing hitch.
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Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-3500 Regular Cab (4WD)
6000 V8 Dual Rear
Wheel4.10 9,800 lbs (4 445 kg) 16,000 lbs (7 257 kg)
6000 V8 Single Rear
Wheel4.10 10,000 lbs (4 536 kg) 16,000 lbs (7 257 kg)
8100 V8 Dual Rear
Wheel4.10 15,400 lbs (6 985 kg) 22,000 lbs (9 979 kg)
8100 V8 Single Rear
Wheel4.10 15,600 lbs (7 067 kg) 22,000 lbs (9 979 kg)
6.6L V8 Dual Rear
Wheel (Auto)3.73 16,700 lbs (7 575 kg) 23,500 lbs (10 659 kg)
6.6L V8 Dual Rear
Wheel (Manual)3.73 16,700 lbs (7 575 kg) 23,500 lbs (10 659 kg)
6.6L V8 Single Rear
Wheel3.73 15,400 lbs (6 985 kg) 22,000 lbs (9 979 kg)
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Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-3500 Extended Cab (4WD)*
6000 V8 Dual Rear
Wheel4.10 9,400 lbs (4 264 kg) 16,000 lbs (7 257 kg)
6000 V8 Single Rear
Wheel4.10 9,600 lbs (4 354 kg) 16,000 lbs (7 257 kg)
8100 V8 Dual Rear
Wheel4.10 15,000 lbs (6 804 kg) 22,000 lbs (9 979 kg)
8100 V8 Single Rear
Wheel4.10 15,000 lbs (6 804 kg) 22,000 lbs (9 979 kg)
6.6L V8 Diesel Dual
Rear Wheel (Manual)3.73 16,300 lbs (7 394 kg) 23,500 lbs (10 659 kg)
6.6L V8 Diesel Dual
Rear Wheel (Auto)3.73 16,300 lbs (7 394 kg) 23,500 lbs (10 659 kg)
6.6L V8 Diesel Single
Rear Wheel3.73 15,000 lbs (6 804 kg) 22,000 lbs (9 979 kg)
* Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up
to 3,500 lbs (1 587 kg) maximum.
Fifth-wheel or gooseneck GCWR for 6.6L V8 Diesel 3500 SRW series models is 23,200 lbs (10 523 kg).
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Page 394 of 600

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-3500 Crew Cab (4WD)*
6000 V8 Dual Rear
Wheel4.10 9,200 lbs (4 173 kg) 16,000 lbs (7 264 kg)
6000 V8 Single Rear
Wheel4.10 9,400 lbs (4 264 kg) 16,000 lbs (7 264 kg)
8100 V8 Dual Rear
Wheel4.10 12,000 lbs (5 443 kg) 22,000 lbs (9 979 kg)
8100 V8 Single Rear
Wheel4.10 12,000 lbs (5 443kg) 22,000 lbs (9 979 kg)
6.6L V8 Diesel Single
Rear Wheel (Auto)3.73 12,000 lbs (5 443 kg) 22,000 lbs (9 979 kg)
6.6L V8 Diesel Single
Rear Wheel (Manual)3.73 12,000 lbs (5 443 kg) 22,000 lbs (9 979 kg)
6.6L V8 Diesel Dual
Rear Wheel (Auto)3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 kg)
6.6L V8 Diesel Dual
Rear Wheel (Manual)3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up
to 3,500 lbs (1 587 kg) maximum.
Fifth-wheel or gooseneck GCWR for 6.6L V8 Diesel 3500 SRW series models is 23,200 lbs (10 523 kg).
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Page 395 of 600

The Gross Combination Weight Rating (GCWR) is the
total allowable weight of the completely loaded vehicle
and trailer including any passengers, cargo, equipment
and conversions. The GCWR for your vehicle should not
be exceeded.
You can ask your dealer for our trailering information or
advice, or you can write us at the address listed in your
Warranty and Owner Assistance Information Booklet.
In Canada, write to:
General Motors of Canada Limited
Customer Communications Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
Weight of the Trailer Tongue
The tongue load (A) of any trailer is an important weight
to measure because it affects the total or gross weight of
your vehicle. The Gross Vehicle Weight (GVW) includes
the curb weight of the vehicle, any cargo you may carry in
it, and the people who will be riding in the vehicle. If you
have a lot of options, equipment, passengers or cargo in
your vehicle, it will reduce the tongue weight your vehicle
can carry, which will also reduce the trailer weight your
vehicle can tow. And if you will tow a trailer, you must add
the tongue load to the GVW because your vehicle will be
carrying that weight, too. SeeLoading Your Vehicle on
page 4-48for more information about your vehicle’s
maximum load capacity.The trailer tongue weight (A) should be 10 percent to
15 percent of the total loaded trailer weight, up to a
maximum of 600 lbs (272 kg) for the 1500 or 2500 series,
and up to a maximum of 750 lbs (340 kg) for the 2500 HD
or 3500 series with a weight carrying hitch. The trailer
tongue weight (A) should be 10 percent to 15 percent
of the total loaded trailer weight, up to a maximum of
1,000 lbs (453 kg) for the 1500 series and up to a
maximum of 1,500 lbs (680 kg) for the 2500, 2500 HD
or 3500 series with a weight distributing hitch.
Fifth wheel or gooseneck kingpin weight should be 15 to
25 percent of the trailer weight up to the maximum
amount speci ed in the trailering chart for your vehicle.
See “Weight of the Trailer”, and “Fifth-Wheel and
Gooseneck Trailering” in this section.
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Do not exceed the maximum allowable tongue weight
for your vehicle. Choose the shortest hitch extension
that will position the hitch ball closest to the vehicle.
This will help reduce the effect of trailer tongue weight
on the rear axle.
After you have loaded the trailer, weigh the trailer and
then the tongue separately, to see if the weights are
proper. If they are not, you may be able to get them
right by moving some items around in the trailer.
Trailering may be limited by the vehicle’s ability to carry
tongue weight. Tongue weight cannot cause the vehicle
to exceed the GVWR (Gross Vehicle Weight Rating) or
the RGAWR (Rear Gross Axle Weight Rating). The effect
of additional weight may reduce your trailering capacity
more than the total of the additional weight.Consider the following example:
A vehicle model base weight is 5,500 lbs (2 495 kg);
2,800 lbs (1 270 kg) at the front axle and
2,700 lbs (1 225 kg) at the rear axle. It has a
GVWR of 7,200 lbs (3 266 kg), a RGAWR of
4,000 lbs (1 814 kg) and a GCWR (Gross Combination
Weight Rating) of 14,000 lbs (6 350 kg). The trailer rating
should be:
You can expect tongue weight to be at least 10 percent of
trailer weight (850 lbs (386 kg)) and because the weight
is applied well behind the rear axle, the effect on the rear
axle will be greater than just the weight itself, as much as
1.5 times as much. The weight at the rear axle could be
850 lbs (386 kg) X 1.5 = 1,275 lbs (578 kg). Since the
rear axle already weighs 2,700 lbs (1 225 kg), adding
1,275 lbs (578 kg) brings the total to 3,975 lbs (1 803 kg).
This is very close to, but within the limit for
RGAWR as well. The vehicle is set to trailer up to
8,500 lbs (3 856 kg).
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