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.
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HOMESERVICE MANUALSCHEVROLET2025TRAILBLAZER ACTIV, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSVEHICLE ACCESS SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B1019 - LIFTGATE CONTROL MODULECIRCUIT/SYSTEM TESTING
2025 Chevrolet Trailblazer ACTIV, FWD
Circuit/System Testing
2025 Chevrolet Trailblazer ACTIV, FWDSECTION Circuit/System Testing
- Ignition ON.
- Perform the Liftgate Calibration . The K39 Liftgate Control Module should learn the travel limits, exit the calibration mode, and B1019 00 will become a history code.
- If the K39 Liftgate Control Module does not exit the calibration mode or if B1019 00 does not become a history code.
Replace the K39 Liftgate Control Module
- Go to next step: If the K39 Liftgate Control Module does exit the calibration mode and B1019 00 becomes a history code.
- If the K39 Liftgate Control Module does not exit the calibration mode or if B1019 00 does not become a history code.
- All OK.
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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.