Originally Posted by BigCountryx

A 1500HD has the Same frame as the 2500HD and 3500 from the front Frame horns to the rear axle. At that point it swedges down to about the size of the 1500. The frame heights on the 1500HD and the 2500HD are the same, but the 2500HD has the body mounts, mounted higher on the frame, making the body about 2" higher. The 1500HD also has the same running gear as the base model 2500HD (LQ4/4L80E) I think it's safe to call it 3/4 ton. My drop kit is for a 3500.