i have a 2010 escalade esv and have a service suspension message. i have replaced rear shocks,ride hight sensors, suspension control module, compressor and its still on . tried pulling rtd fuse still on , used the resistors on shocks disconnected battery and pulled rtd fuse still on. i can not figure this out and i really need help. the biggest issue is not being able to go over 80mph because of the message.
Why don't you try reading the codes and that will lead you to the issue. Stock is the only way to go to keep DTC's from popping up. You need a scanner that reads all the modules not just OBD.