Part b leveling valve installation – Hellwig Air 6290 User Manual
Page 9
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11. Reference the ride height from step (1) and subtract 1” from this measurement. Ad-
just frame height to the new measurement and place frame on jack stands. This will al-
low the vehicle to have a level attitude as GM built in rake to accommodate compres-
sion of the coil spring under load. The air suspension will hold ride height regardless of
load. IMPORTANT- You must reduce the rear ride height 1” to prevent the leveling
valve linkage from contacting the floorpan.
6090 ( R-6090)
03/09/07
Part B Leveling Valve Installation
12. Remove 2 bolts from differential cover as shown. Re-use bolts to attach leveling
valve axle bracket as shown. Place qty (2) 5/16” washers between differential cover and
bracket at each bolt location to make bracket sit square. Torque to 10-12 ft-lb.
Remove 2 bolts
Qty (2) 5/16”
washers be-
tween bracket
and cover at
each bolt loca-
tion .
Subtract 1” from
reference dimension