Cadillac XTS rear air suspension failure and air compressor replacement issue on Cadillac XTS

Some Cadillac XTS owners report experiencing rear air suspension issues, including failure to raise the vehicle, low ride height, and air compressor malfunctions, which can lead to vehicle sagging and trigger a Service Leveling System warning. Many owners note that the air compressor is a frequent point of failure, significantly affecting ride quality and comfort when the warning light is illuminated. Additionally, some report that rear air bag failures while driving can cause the rear end to drop unexpectedly, resulting in bouncing on uneven roads. If the compressor is operational but the rear continues to sag, it may indicate leaks in components such as the rubber boot or air hoses. Unevenness on one side of the vehicle could stem from air line or air spring leaks, or position sensor issues, while bottoming out over bumps may suggest shock absorber problems. Timely diagnosis and maintenance are crucial for ensuring the proper functioning of the air suspension system in the Cadillac XTS.