GMC 2006 Sierra 1500 Pickup Owner's Manual page 392

Vehicle*
K-3500 Regular Cab (4WD)
6000 V8 Dual Rear
Wheel
6000 V8 Single Rear
Wheel
8100 V8 Dual Rear
Wheel
8100 V8 Single Rear
Wheel
6.6L V8 Dual Rear
Wheel (Auto)
6.6L V8 Dual Rear
Wheel (Manual)
6.6L V8 Single Rear
Wheel
4-80
Axle Ratio Maximum Trailer Weight
4.10 9,800 lbs (4 445 kg)
4.10 10,000 lbs (4 536 kg)
4.10 15,400 lbs (6 985 kg)
4.10 15,600 lbs (7 067 kg)
3.73 16,700 lbs (7 575 kg)
3.73 16,700 lbs (7 575 kg)
3.73 15,400 lbs (6 985 kg)
GCWR
16,000 lbs (7 257 kg)
16,000 lbs (7 257 kg)
22,000 lbs (9 979 kg)
22,000 lbs (9 979 kg)
23,500 lbs (10 659 kg)
23,500 lbs (10 659 kg)
22,000 lbs (9 979 kg)