Chevrolet 2003 Silverado 1500 Pickup Owner's Manual page 351

Vehicle*
I
Axle Ratio
I
Maximum Trailer Weight GCWR
*
Tongue weight should be 10 percent to
15 percent of trailer weight up to 1,000 Ibs (454 kg). Fifth-wheel or gooseneck kingpin weight 15 percent to
25 percent of trailer weight up to 1,500 Ibs. (680 kg) maximum.
**Maximum 8,000 Ibs. (3 628 kg) for fifth-wheel or gooseneck.
***Maximum 7,500 Ibs. (3 401 kg) for fifth-wheel
or
gooseneck.
4-70