Air shock leveling side to side?

I have an '04 Escalade with self-leveling air shocks in the rear. Are the shocks individually controlled? The car is 3/4" higher on the passenger side, and I thought if I adjusted the sensors for ride height I could level the car out.

No, your shocks are not individually controlled. There is one compressor mounted under the left rear of your vehicle that controls both rear shocks. You have torsion bars that control the ride height of your truck, they can be ajusted to correct ride height, but a alignment is required after doing so. I would recomend taking your truck to a quality alignment shop, tell them what the problem is and what you want done, torsion bar adjustment is usually included with a alignment, so there should be no extra charge for that.