rear tires siting /..\

i was told that rear air ride would make your tires ride bowed out .... having an issue with my rear tires wearing on the inside of my 92 deville

Is the air ride making the car sit too high or low?

have the suspension and alignment checked sounds like the caster and or camber is off.

thats neg camber setting like that..you need get it on alignment rack..and the air ride on rear are ajustable...good luck...