Chevrolet 2008 Express Owner's Manual page 234

The following charts show how much your trailer can weigh, based upon vehicle model and options.
G1500 Cargo Van 2WD
4300 V6
5300 V8
H1500 Cargo Van AWD
5300 V8
G1500 Passenger
Van 2WD
5300 V8
H1500 Passenger
Van AWD
5300 V8
G2500 Cargo Van 2WD
Short Wheelbase
4800 V8
6000 V8
4-30
Axle Ratio Maximum Trailer Weight
3.73 4,400 lbs (1 996 kg)
3.73 6,700 lbs (3 039 kg)
Axle Ratio Maximum Trailer Weight
3.73 6,500 lbs (2 948 kg)
Axle Ratio Maximum Trailer Weight
3.73 6,300 lbs (2 858 kg)
Axle Ratio Maximum Trailer Weight
3.73 6,000 lbs (2 722 kg)
Axle Ratio Maximum Trailer Weight
3.73 6,400 lbs (2 903 kg)
4.10 7,400 lbs (3 357 kg)
3.73 8,400 lbs (3 810 kg)
4.10 10,000 lbs (4 536 kg)
GCWR*
9,500 lbs (4 309 kg)
12,000 lbs (5 443 kg)
GCWR*
12,000 lbs (5 443 kg)
GCWR*
12,000 lbs (5 443 kg)
GCWR*
12,000 lbs (5 443 kg)
GCWR*
12,000 lbs (5 443 kg)
13,000 lbs (5 897 kg)
14,000 lbs (6 350 kg)
16,000 lbs (7 257 kg)