I recently purchased a 2008 Z7 Nitro. Having trouble understanding the controls for the livewell. Have read some posts that have helped-learned the valve in the livewell has a push/ pull valve. I do not have a separate switch under my throttle for aerate/ fill, etc. I have basically two switches: pumpout/ recirculate and aerate auto/ manual. The pumpout/recirc switch makes absolutely no sense since there is no neutral position on the switch, so it must be doing one or the other. The auto aerate seems to work but when I use the manual aerate it fills the livewell and then overflows and I end up having to bilge.. is there supposed to be a float switch that controls that filling? I am looking for a basic description of how the system is supposed to work. Appreciate any help I can get