To find it, you'll likely need to:
* Consult a repair manual: A factory service manual will show the exact location and provide diagrams.
* Look near the air compressor: The compressor is usually under the hood or in the rear of the vehicle near the spare tire. The exhaust valve is often close by to facilitate air release.
* Follow the air lines: Trace the air lines running from the compressor to the rear suspension. The valve might be located along these lines, often near a connection point.
* Look underneath the vehicle: Get under the vehicle (safely supported on jack stands) and examine the air suspension components.
Caution: Working on air suspension systems requires some mechanical knowledge. If you're not comfortable working under the vehicle or with air suspension systems, it's best to take it to a qualified mechanic.