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Home >> Chevrolet >> 2017 >> Silverado 1500 SSV, 4WD, Part Time T/Case Control, Gas >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System - DTC B1000 To DTC U1026 >> Diagnostic Information and Procedures >> DTC U0074: Control Module Communication (Powertrain Expansion Bus with HP5) >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON/Vehicle In Service Mode.
  2. Verify that DTC P0606 is not set.
    • If DTC P0606 is not set 
  3. Refer to Circuit/System Testing.
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