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 inlet valve - RR is controlled by the air suspension module. The air suspension module provides a switched path to voltage whenever inlet valve activity is required. The air suspension module monitors the inlet valve circuity to determine if the voltage level agrees with the command state.