Review on 🚗 ACDelco GM Original Equipment 504-146 Rear Driver Side Air Lift Shock Absorber: Enhance Your Vehicle's Ride with Superior Quality by Jeff Aulia

Drove straight into a 2006 Buick Lucerne with the hard suspension option. The ride height air system leak has been fixed and the vehicle is back where it should be. If your system is leaking, you will hear how long and how often the air suspension compressor runs. It only took me 10 minutes per side to swap them out. All you have to do is jack up the wheel and remove it. To gain access to the upper mounting screws, pull back the trunk trim panel. Overhead line is a quick connection style. I think the only difference between the different part numbers (504-147 and 504-146) is the orientation of the top bracket relative to the air line connector. All you have to do is loosen the top mounting screw and turn it 180 to bring it to the other side. I ended up ordering both part numbers not knowing that that was the only difference. But if they only stock one number you should be fine if you only order 2 of these.