rear struts
 

i have a 1997 buick lesabre ! i have not looked at it since i bought it but some people said those cars came out with rear air struts ! they don,t want to pump up and it drags with a load in the rear ! if it has air struts how much are those air compressors ? if it has a compressor where do i start looking to see why they are not working ? thanks guys !