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Originally Posted by UCrewX5
look to see if there is an air compressor unit in the spare tire compartment, right above the battery. There should also be large black air bladders in the suspension area.
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I have an '01 4.4 and i have the black air bladders in front and back. What does this mean as far as the leveling system. This might sound like a stupid quest. but what does this system do exactly?