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.
Exterior Handle Switch: Operation
When the exterior liftgate handle switch is depressed a hard-wired message is sent to the Body Control Module (BCM). The Body Control Module then sends a PCI data bus message to the power liftgate control module. The BCM message includes lock status and PRNDL position, which the power liftgate control module interprets. If operating conditions are met, the power liftgate control module then applies power to the latch mounted actuator, which moves the liftgate from the primary closed and latched position to the open and movable position.
If the liftgate is not pulled open within a few seconds, once the latch releases, the latch will automatically cinch closed.
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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.