It's located inside the front passenger wheel well (top toward the back of the well)
the 2001 is behind the passenger side headlight
There are several O-Rings. fill your info at the bottom page www.starbaja.com
possibly the height sensors came unplugged rear or front but that will dissable the pump.
Rear quarter, driver's side next to subwoofer adjacent to the fuel turn off switch there's an air ride turn off switch.
Under the window washer tank
Can't post a picture but, the air suspension compressor relay should be found close to the passenger side front headlight.
It may your air ride system. Try converting the car. Go to Strutmasters.com and see if they can help. They helped me with my 2003 Lincoln Navigator problems, I'm sure they have something for you :)
Take it for a ride with some fat chicks
The air ride suspension relay is above the right cooling fan right in the middle of the hood crossover (above the radiator)
Under the windshield washer fluid resivour on the lefthand side.
No it's a good SUV very stylish and best ride out there as far as luxury and hanling.
I am pretty sure the dealer can do it or you can but a NGS scan tool or something similar.