Sits low

there is a "ride height" adjusting rod under the rear suspension. It's possible that it is stuck, bent, or not functioning anymore. You'll have to either crawl under it to see it or have it put on a lift and look for it. It should be in the middle of the rear between the body and the frame that it bolts to. That bar is what makes your vehicle adjust to the proper level. go onto youtube videos and type into the search box the year, make and model of your vehicle, including "rear height adjustment" and it should pull up some vids of it.