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GMC Workshop Service and Repair Manuals

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Transmission Position Switch/Sensor, A/T|Description and Operation|Page 636 > < Engine Controls - Service Engine Soon Light, DTC 22-TPS|Page 632

Syclone V6-262 4.3L Turbo (1991)

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Transmission Position Switch/Sensor: Description and Operation

Park/Neutral Switch

The Park/Neutral switch indicates to the computer when the transmission is in park or neutral. This information is used by the computer for ignition
timing, Idle Air Control operation, and transmission Torque Converter Clutch (TCC) operation.  Do not drive the vehicle with the Park/Neutral switch
disconnected, since idle quality may be affected.

Transmission Position Switch/Sensor, A/T|Description and Operation|Page 636 > < Engine Controls - Service Engine Soon Light, DTC 22-TPS|Page 632