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Home >> Chevrolet >> 2021 >> Trailblazer L >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> DTC P257D-P257F >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Open the hood.
  3. Verify the scan tool parameter: Hood Position. = open
    • If not the specified state 

      Refer to Circuit/System Testing

    • Go to next step: If the specified state 
  4. Close the hood.
  5. Verify the scan tool parameter: Hood Position. = Closed
    • If not the specified state 

      Refer to Circuit/System Testing

    • Go to next step: If the specified state 
  6. All OK.
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