Jan 16, 2014· I just bought a new to me 2000 Silverado 2500. Its stock (no lift). Ill be towing my 18' Crownline boat, which is 3360 lbs with about 3/4 of a tank of gas. Fully loaded with gear and gas, I imagine Ill be in the 3500+ lb range. I have not checked yet, but using a 10-15% rule of thumb, I would guess Ill have a tongue weight in the lb range.