Use "H" when you want the suspension stiffer ie "hard"

Use "M" for medium

Use "S" for soft..

Basicly drive the truck in each mode and decide what you like the best. I prefer the controlled feel of "H" myself.

99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..