With zero air pressure, the Chevy sits nice and level now (maybe a bit lower in the rear). Air Ride recommends running at least 5 pounds in each bag (absolute minimum) when driving so not to damage the ShockWaves. A good rule of thumb for adjusting the QA1 shocks: One positive click for each 10 pounds of pressure in the bags (the shocks have a total of 12 firmness positions via a switch located toward the bottom).