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
2015 Chevrolet Captiva Sport LTZSECTION Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the following modules one at a time. After each disconnect, clear the DTC, cycle the ignition key 3 times, then test for the DTC. DTC U2099 should remain current.
- EBCM
- Transfer case control module
- If the DTC becomes history, replace the last module disconnected when the DTC became history.
- Ignition OFF, disconnect the X3 harness connector at the BCM.
- With the modules still disconnected, test for infinite resistance between BCM X3 terminal 19, and ground.
- If less than the specified value, test the circuit for a short to ground.
- If all circuits test normal and the DTC is set as current, replace the BCM.
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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.