I’m having issues with the suspension on my 13’ Escalade. The RF strut is bad, I ordered a pair of oem struts, the air compressor doesn’t run when activating it with my scan tool, so I have a replacement compressor on the way. The LR shock had a short to ground suspension fault and currently displays “open circuit”. I haven’t had the chance to inspect the wiring integrity to confirm the shock is bad but it wouldn’t surprise me if it was. The RR air shock reads 2.5psi which seems low? I don’t have any experience with the Z95 suspension systems to know what’s normal/abnormal. I’ve attached the scan tool screenshots of the suspensions live data, does anything other then the RF strut and LR shock look abnormal? What would you expect the resting air shock pressure to be while driving in normal conditions?
if the pump burned out it is likely because the shock bladders are leaking, that's just how it goes.....
other than that normal resting psi without a load on the vehicle in my experience is around 20-25 psi
once you get your replacement pump installed you can check for shock bladder leaks with a spray bottle of soap and water mix, spray the shocks and watch for bubbles.
you can also just let it sit overnight and before you start it up in the morning reach under the rear wheel and feel the bladder by hand it should hold air for several weeks without the pump running, but if it is flat by morning then you know for sure there is a leak.
you could also check by driving around for a little bit and pull over and feel the bladders without cycling the key to get a better idea of how bad the leak is. (if there is a leak)