GMC Sierra 2018 Owner's Manual page 306

1500/2500/3500 Series Pickups
Vehicle
1500 Series 4WD Crew Cab Short Box (b)
4.3L V6
5.3L V8
5.3L V8
5.3L V8, 8-speed automatic
transmission with Enhanced
Towing Package
5.3L V8
6.2L V8
6.2L V8
1500 Series 4WD Regular Cab Long Box
4.3L V6 Conventional Trailer
4.3L V6 Gooseneck/Fifth Wheel
5.3L V8 Conventional Trailer
5.3L V8 Gooseneck/Fifth Wheel
5.3L V8 Conventional Trailer
5.3L V8 Gooseneck/Fifth Wheel
SAE J2807 Compliant
Axle Ratio
3.42
3.08
3.42
3.42
3.73
3.23
3.42
3.42
3.42
3.08
3.08
3.42
3.42
Driving and Operating
Maximum Trailer
Weight (c)
3 175 kg (7,000 lb)
2 767 kg (6,100 lb)
4 128 kg (9,100 lb)
4 853 kg (10,700 lb)
4 853 kg (10,700 lb)
4 128 kg (9,100 lb)
5 307 kg (11,700 lb)
3 357 kg (7,400 lb)
3 311 kg (7,300 lb)
2 948 kg (6,500 lb)
2 903 kg (6,400 lb)
4 309 kg (9,500 lb)
4 264 kg (9,400 lb)
305
GCWR (a)
5 806 kg (12,800 lb)
5 443 kg (12,000 lb)
6 804 kg (15,000 lb)
7 575 kg (16,700 lb)
7 575 kg (16,700 lb)
6 804 kg (15,000 lb)
8 029 kg (17,700 lb)
5 806 kg (12,800 lb)
5 806 kg (12,800 lb)
5 443 kg (12,000 lb)
5 443 kg (12,000 lb)
6 804 kg (15,000 lb)
6 804 kg (15,000 lb)