How do I use Bluebuck adjustable suspension?

I saw that the Bluebuck has adjustable suspension, and I see the controls for it, but every time I press one of them nothing happens... anyone know what I'm doing wrong?

I have tried googling it... theres nothing on it...

 

Post a screenshot? Sounds like a mod to me

 

haha I found it... I needed to use the "low rider" Bluebuck...

 

Anything with the hydraulic parts installed, but the "lowrider" config is the only default one to. You can go into the parts menu to put them on a custom config. Same for the Grand Marshall.