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Press and hold the warmer and off buttons to check diagnostic codes......This can be many things such as a height sensor, air compressor, strut, ect. Let me know what codes you get.
There shoudl be a "Off" button and "warm" button. Do you have a button to make temp warmer? If so pres and hold those two buttons.
Here is a picture of buttons to press.
GM has a Technical Service Bulletin # XXXXX for this vehicle that consists of replacing the electronic struts with standard struts, then disabling the message for this system. After the struts have been replaced, enter the onboard diagnostics by pressing the Off and the Warmer buttons at the same time on the climate panel and hold until everything lights up. After any codes are displayed a PCM? will appear, press the Low fan button until IPC? appears. When IPC? is displayed, push the High fan button then it will say IPC Data?, push the Low fan button until IPC Overrides? is displayed then hit the Hi Fan button again. "IS00" will appear, push the Hi Fan button to go to IS08. After a second a number will appear, push the cooler button to decrease that number by 8, (if the number is XXXXX push the cooler button until 00 appears. If it goes too far, push the warmer button to increase). Once the number has been decreased by 8, press and hold the "ECON" and "FRONT DEFROST: buttons until the new value flashes once. Shut off key for 10 seconds, then when the vehicle is started the message should be out. If not, repeat the procedure. (This procedure is reconfiguring the vehicle to tell it is not equipped with the speed sensitive suspension option).