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Where is the fan sensor for a 1996 Buick Regal?

There are two coolant temperature sensors (CTS) on a Buick Regal. The one you're looking for is located on the driver's side of the engine, just below the throttle body. It has a single wire connector. The other CTS is located on the passenger side of the engine, near the thermostat housing. It has two wire connectors.