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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LS >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Shift Lock Control System >> Diagnostic Information And Procedures >> Transmission Control Lever Malfunction >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON / Vehicle in Service Mode.
  2. Verify the scan tool Brake Pedal Applied parameter changes from Inactive to Active when the brake pedal is applied.
    • Go to next step: If the parameter changes 
  3. Verify the transmission shift lever moves out of the PARK position when the brake pedal is applied.
    • If the transmission shift lever does not move out of the PARK position 

      Refer to Circuit/System Testing.

    • Go to next step: If the transmission shift lever does move out of the PARK position 

      All OK.