Step 14:
The air compressor mounts to the opposite frame rail, also using U-bolts to secure it. All air hoses included with the system use push connectors. Simply cut the hose to length and push the end of the hose into the connector.

Step 15:
The height-adjuster switch includes an air-release valve for the kneeling feature. When the toggle switch is flipped, the valve opens and lowers the rear of the truck 3-5 inches in a few seconds. The air tank holds enough air to allow the system to come back up to ride height with the ignition turned off.

Step 16:
There are a couple electrical connections to make underhood. A relay is included with the wiring harness. Battery power is tapped at the distribution block near the battery (shown), and a trigger wire connects to a keyed power source in the fuse box. The air filter (arrow) for the air compressor is also mounted here, keeping it high and dry.

Step 17:
The final steps are completed with the wheels replaced and the truck sitting on level ground. To set the desired ride height, lengthen or shorten the connecting rod from the spring mount to the ride-height switch. You can measure your truck before installation and set the height to that measurement, or you can level the rear of the truck to match the front. Torque the leaf spring and J-link