Releasing air from an air suspension system is something that should be done correctly and with caution. To begin, you will want to ensure the vehicle is on a flat surface and the engine is turned off. Next, locate the Schrader valve which can usually be found near or in the frame of your vehicle; this is where you'll use a tire pressure gauge to measure how much air pressure remains in the system. If there's still some air remaining, make sure to release it slowly using either a manual or automatic valve core remover. Finally, if need be, refill your suspension system according to manufacturer's instructions before re-installing any components for optimal performance. Following these steps should help you effectively and safely release any built up pressure from an air suspension system without any issues!