Circuit Description (W/O F55)
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
The automatic level control (ALC) module adjusts the vehicle suspension ride height. The ALC module determines the height of the vehicle based on the signal from the height sensor. The ALC module raises and lowers the vehicle in order to keep the vehicle level by controlling the exhaust valve and air compressor control circuits.