2004 Cadillac Escalade Ext

Suspension problem
2004 Cadillac Escalade Ext V8 Four Wheel Drive Automatic 55000 miles

" Service Ride Control"
How would I start to troubleshoot this problem? I did not change the tires recently and my brakes seem ok. I hooked a code reader up to the ecm and no code came back. Where do I go from here and is there something I could look at first? Please help! This is killing me!
June 11, 2009.

A code reader is probably only good for ecm/tcm codes. You need to seek a scanner that will communicate with all modules and read data to effectively pinpoint your problem. At a minimum, for me to offer any assistance, I would need a code.

Jun 12, 2009.