LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2016 >> Suburban 3500 HD LS >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Wiring Systems And Power Management - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B1370, B1380, or B1441: Control Module Ignition ON and Start Circuit/Control Module Ignition Accessory Circuit/Control Module Ignition OFF, Run, and Start Circuit >> Circuit/System Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Verification

  1. Verify DTC U1814 is not set.
    • If DTC is not set 
  2. Ignition ON.
  3. Verify the scan tool power mode parameters change when cycling the S39 Ignition Switch between OFF, Accessory, ON, and Start.
    • If the power mode parameters do not change 

      Refer to Circuit/System Testing.

    • If the power mode parameters change 
  4. All OK.
scientia non olet · About LEMON Manuals