Circuit/System Verification

2025 Chevrolet Suburban LS, RWDSECTION Circuit/System Verification
  1. Verify DTCs C103C 11, C103C 12, C103C 15, C103D 11, C103D 12, C103D 15, C103E 11, C103E 12, C103E 15, C103F 11, C103F 12 or C103F 15 are not setting as current.
    • If any of the DTCs are setting as current 

      Refer to Circuit/System Testing: Test A

    • Go to next step: If DTCs are not setting as current 
  2. Verify DTCs C103C 64, C103D 64, C103E 64, or C103F 64 are not setting as current.
    • If one of the DTCs are setting as current 

      Refer to Circuit/System Testing: Test B

    • Go to next step: If DTCs are not setting as current 
  3. Verify DTCs C103C 28, C103D 28, C103E 28, or C103F 28 are not setting as current.
    • If one of the DTCs are setting as current 

      Refer to Circuit/System Testing: Test C

    • Go to next step: If DTCs are not setting as current 
  4. A fault is not currently present and may be an intermittent condition.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.