This video shows how a dealership would diagnose and repair a Service Suspension System message on a GM vehicle.

To view my video on this topic that shows how to diagnose this issue without the use of a Tech II:    • How to Troubleshoot and Repair a GM A...  

To view my video on how to replace air shocks:    • How to Fix Leaking Air Shocks on a Yu...  

To purchase the Tech II I used in this video (Note: I do not guarantee this product or seller. This is just a link to help you know what I bought. This is not where I purchased mine as I purchased mine years ago and I could not find the seller anymore.) https://www.obd2tool.com/goods1568G...