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Home >> Chevrolet >> 2009 >> Uplander Base, 3.9 M >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Automatic Level Control >> Diagnostic Information and Procedures >> Automatic Level Control Inflator Fill Valve Inoperative >> Circuit/System Verification

Circuit/System Verification

Ignition ON, press the accessory inflator switch continuously for 3 seconds. This activates the ALC self test of the rear shocks. The rear of the vehicle will rise, and then hold the rear of the vehicle up for a calibrated amount of time, to check for leaks, and then lower the rear of the vehicle to trim height. The total self test time is 200 seconds.