many folks have changed out the self leveling system, some say it rides even better without it. I for one kept mine but shouldn't stop you from buying it. With 110k miles if still original the airbags, level switch and or compressor would all need to be changed soon anyway so you are saving money on that fix.
Steven
2004 Marauder Black, loaded
Vortec S/C
4.10s
3500 PI Stall
Kook's headers
476.9 rwhp 385 lbs/tq
KVR's, QA1's, M&Z control arms, rear sway bar
Lidio tune
2004 Suburban Dark Charcoal
1970 W-30 442 convertible twilight Blue