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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information And Procedures >> DTC B323A, B323B, Or B323C: Upper-Lower Hands Free Sensor Signal Invalid/Hands Free Liftgate Sensor Module >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON.
  2. NOTE:

    The keyless entry transmitter must be within 1 meter (3 feet) of the liftgate

  3. Verify the tail lights flash 3 times and the power liftgate opens while performing a kicking motion behind and under the rear fascia.
    • If the tail lamps do not flash 

      Refer to Circuit/System Testing.

    • Go to next step: If the tail lamps flash and the liftgate does open 
  4. All OK.