I have a 2020 ram 1500 laramie sport. When I have any load on the rear end it sags pretty low. I have coil springs and all I have found for aftermarket options are to install some sort of air bags at least in the rear, but goes with either an external air servicing port, or an onboard air compressor. The problem I am having is finding a way to wire the system (preferably with an onboard compressor) to a stock auxiliary switch in the cab. I have the panel with the switch but the truck didn't come with the system. I have found an onboard compressor that can stow in the floor compartment bins in the backseat floor which I'd like to utilize too. Does anyone know of a kit or wiring harness to connect to an aftermarket air bag system and an onboard air compressor (at least in the rear) and wire it to the oem auxiliary switch on the center console?