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 RS, 4WDREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSVEHICLE ACCESS SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B384ACIRCUIT/SYSTEM DESCRIPTION
2025 Chevrolet Trailblazer RS, 4WD
Circuit/System Description
2025 Chevrolet Trailblazer RS, 4WDSECTION Circuit/System Description
For an overview of the component/system, refer to: Interior Lighting Systems Description and Operation
| Circuit | Description |
|---|---|
| Control | High Control |
| Low Reference | Grounded through the control module. |
| Component | Description |
|---|---|
| B70 Liftgate Close Switch | Illumination lamps are used as backlight for switches or panel areas. |
| K9 Body Control Module | The module controls various vehicle functions like lighting, central door locking, power windows, etc. |
| K39 Liftgate Control Module | The control module K39 controls the liftgate motor function depending on inputs from a variety of sensors, switches and serial data information from other control modules. |
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.