Suspension setting crooked

The passenger side of my car sets lower than the drivers side.

What could cause this and how do you go about fixing it?

What kind of car?

You might want to create a signature that includes basic information about your car, like make, model, year, mods, etc.

'01 Trans AM 6spd, creating Signature now.

This is not an unusual problem, and has been discussed on the "Chassis, Suspension and Brakes" forum a few times. I'll move your post to that forum.