To adjust the air suspension ride height on a 2003 Lincoln Navigator, first, ensure the vehicle is on a flat surface. Use the vehicle's onboard controls to access the air suspension settings, typically found in the driver information center or using a dedicated switch. You can switch between the standard, off-road, and entry/exit modes to raise or lower the vehicle. If manual adjustments are needed, check for any leaks or issues in the air suspension system, as these can affect ride height.
I am pretty sure the dealer can do it or you can but a NGS scan tool or something similar.
i paid $200 retail should be about $250
To activate the air suspension on a 1999 Lincoln Navigator, locate the air suspension switch, typically found in the center console or near the driver's seat. Turn the switch to the "On" position to enable the system. The air suspension will automatically adjust the vehicle's height based on load and driving conditions. If the system doesn't activate, check for any warning lights on the dashboard or consult the owner's manual for troubleshooting.
you have to have a special height sensor tool that can adjust it for you, go to the local parts store and see if they sell it, or if your lucky enough to have a friend that has one.
The height of the 2002 Lincoln Navigator is 6 ft. 3.2 in. (75.2 in.).
The height of the 2010 Lincoln Navigator is 6 ft. 6.3 in. (78.3 in.).
The height of the 2007 Lincoln Navigator is 6 ft. 6.3 in. (78.3 in.).
The height of the 2012 Lincoln Navigator is 6 ft. 6.3 in. (78.3 in.).
The height of the 2004 Lincoln Navigator is 6 ft. 5.8 in. (77.8 in.).
The height of the 2013 Lincoln Navigator is 6 ft. 6.3 in. (78.3 in.).
The height of the 2006 Lincoln Navigator is 6 ft. 5.8 in. (77.8 in.).
The height of the 2009 Lincoln Navigator is 6 ft. 6.3 in. (78.3 in.).