I may be mistaken but I'm guessing that by having the hose hooked up this holds the valve open and allows air to escape from the suspension. By taking off the hose the valve closes thus closing the system and allowing the air suspension to maintain enought pressure to hold the rear at the normal height. Not sure just a thought!
03 Black Adventure with all Lux Options,Brush Guard Lights, and Sylvania Silverstars. Go Vols!!!
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03 Black Adventure with all Lux Options,Brush Guard Lights, Sylvania Silverstars, I-Pod via PAC Device. Go Vols!!!
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