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.
Liftgate Module (LGM)/Endgate Module (EGM)
- Defog Relay Voltage
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The scan tool displays the voltage supplied to the rear defogger grid.
- Rear Defog Requested
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The scan tool displays Yes/No. When the window defogger switch is pressed, a request from HVAC control module is sent to LGM. This parameter indicates if the request was received.
- Rear Defog Commanded
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When the window defogger switch is pressed, a request from the HVAC control module is sent to the EGM. This parameter indicates if the request was received and executed. "Suspend" is displayed when the end-gate glass is open.
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.