GMC Sierra 2008 Owner's Manual page 370

C-3500 Regular Cab
(2WD)*
6.0L V8
*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.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
**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.
C-3500 Extended Cab
(2WD)*
6.0L V8
6.0L V8 (Dual Rear
Wheels)
*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.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
**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.
4-68
Axle Ratio Maximum Trailer Weight
3.73 10,100 lbs (4 581 kg)
4.10 12,600 lbs (5 715 kg)
Axle Ratio Maximum Trailer Weight
3.73 9,700 lbs (4 400 kg)
4.10 12,200 lbs (5 534 kg)
3.73 9,500 lbs (4 309 kg)
4.10 12,000 lbs (5 443 kg)
GCWR**
16,000 lbs (7 257 kg)
18,500 lbs (8 391 kg)
GCWR**
16,000 lbs (7 257 kg)
18,500 lbs (8 391 kg)
16,000 lbs (7 257 kg)
18,500 lbs (8 391 kg)