2003 Olds Silhoutte Air Shocks and Compressor - not working

The load leveling shock will not work if there is an issue with the compressor. If you buy the sir shock's, your going to have to address the compressor issue to even have the air shocks level the Silhouette. Once you have the compressor issue addressed, the shocks it's self is simple enough to replace that you can do it with common tools to save you some money. My wife has a Montana and we had the same problem, since we do not tow and really never hold that much weight. We replaced the rear shocks with Monroe Reflex Shocks, Found the van to be much more sturdy then the air shocks ever were and the good thing about them is there were lift time replacement at Parts Source. Regardless on which shocks your going to use, it's a good rule to replace both sides at the same time. The only difference in to reinstalling the air shocks is you need to reattach the air lines to the shocks and that's simple as removing the shocks it self. The shocks are only held on by two bolts,  one on top and one on bottom and should only take about 20 min each side to do since you have to jack the car up and remove the wheel for room, but you can remove the shocks it self without removing the wheel, it's your preference. Good luck and keep me posted, be glad to answer any questions you may have. 

Replaced air shocks on my 2000 Silhouette in July 2009. Removing and replacing shocks was easy after removing rear wheels. Had two problems. First - had to replace all rubber hoses attached to the compressor as they had rotted. Accessing one of the fittings was not easy. Second - after disconnecting the retaining clip, could not get one of the air lines off the shock nipple because of rust buildup inside the nipple. When I cut the nipple off, the heat generated melted the plastic air line. The air line uses two O-rings retained by a flair at the end of the line to seal the connection. I had to cut the flair and the melted part off, reinstall the O-rings, insert the new end of the air line into the small hole leading from the nipple into the shock cylinder, then install the retention fitting. The 60-90 degree bend in the retention fitting seems to hold the line and O-rings in far enough so its not leaking air without the flair. I'm assuming the flair was an assembly line aid to retain the O-rings until the lines were installed and hooked up.