Circuit Description
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
The air suspension exhaust valve is controlled by the air suspension module. The air suspension module provides a switched path to voltage whenever exhaust valve activity is required. The air suspension module monitors the exhaust valve circuity to determine if the voltage level agrees with the command state.