Instructions I received when I installed my Air Lift 5000's were to park on level ground, measure from ground to a point on truck such as top of bumper, then hook up trailer and measure again, then inflate bags with trailer attached to get back to first measurement. Mine takes 60 psi to do this.
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2016 F-250 Lariat Super Duty 6.7L
2019 High Country 310RE
Andersen Ultimate hitch
Air Lift 5000 airbags
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