Air Suspension Inflator Switch and Fill Valve
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 inflator system consist of a inflator hose to provide a means of inflating objects and a switch with a LED located in the rear compartment. The inflator will only function when the engine is running and the vehicle is in PARK. The switch LED will be illuminated with the inflator ON. The inflator function will have priority over leveling functions.