Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit/System Testing
2018 Chevrolet Traverse LS, 4WDSECTION Circuit/System Testing
- Ignition OFF/Vehicle OFF, disconnect the harness connector at the control module setting the DTC.
- Ignition ON/Vehicle in Service Mode.
- Verify a test lamp illuminates between the accessory wake up serial data circuit and ground.
- If the test lamp does not illuminate.
- Ignition OFF/Vehicle OFF, remove the test lamp, disconnect the X4 connector at the K9 Body Control Module.
- Test for less than 2 Ω on the ignition circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K9 Body Control Module.
- Go to next step: If the test lamp illuminates
- Replace the control module setting the DTC.
RENDER: 1.0x
NO RELATED
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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.