Abstract: Methods for adjusting the elevation of a vehicle chassis mounted on an air spring are disclosed including supplying pressurized air to the air spring, pressurizing the bellows portion of the air spring in order to adjust the elevation of the vehicle chassis, and pneumatically isolating the bellows from the piston portion of the air spring, whereby the time for adjusting the elevation of the vehicle chassis is minimized by effecting the adjusting and pressurizing only the bellows. Apparatus for adjusting the elevation of a vehicle chassis are also disclosed.