GMT900 HVAC Mode Door Actuator — Chevrolet Silverado / GMC Sierra Open image to view full size. Confirm details against the part you need.

GMT900 HVAC Mode Door Actuator — Chevrolet Silverado / GMC Sierra

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Part details & compatibility

Replacement mode-door actuator controlling vent/floor/defrost output.

Fitment: Verify location and function; visually similar actuators can be position-specific.

Before ordering: HVAC fitment can depend on body generation, manual vs automatic climate control, engine, HVAC RPO, actuator position, connector, and A/C system configuration. Confirm the original component before ordering.

Part identification: This is a catalog reference. Confirm the manufacturer part number and vehicle configuration before selecting this part.

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