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Home >> GMC >> 1997 >> Safari Van Passenger, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation 4.3L >> Computerized Engine Controls >> Input Devices >> Gear Switches
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Gear Switches

Gear switches are located inside automatic transmission. Switches may be normally open or closed, and change status depending upon internal hydraulic pressures. PCM/VCM uses high gear switch information in controlling emission components and engagement of Torque Converter Clutch (TCC).

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