It says this will increase the height of the truck. Does raise the front, like a leveling kit, or the overall height?

If the HD suspension increases the overall height, how much does it raise it?

For example, the Tremor package, which apparently is not available on the long wheel base trucks, raises the entire truck about 3 inches from what I understand.

 

The Tremor pkg does not lift the truck 3". The coil springs lift it no more than 1.5" (realistically closer to 1.25"), and it has a 1" taller rear block. Any additional height comes from the tire size.

The Heavy Service front suspension option gives you 1 up on front spring rate, or approximately 1/4"-1/2" lift. Snow plow prep is a 2 up(depending on build), and would give maybe 3/4" additional height up front.

 

levels the truck with the rear end.

 

On the 17-19 6.7 trucks it was 800lbs per inch so 400lb higher spring rate of the heavy service springs would raise it 1/2”.