It could be for a gear indicator for an automatic transmission.

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Digital Instrument System Features
Displays included with this instrument system: Speedometer (0-255 MPH or KPH), Tachometer, Oil Pressure, Water Temp, Voltmeter, Fuel Level.
Also shown is: Odometer, Trip Odometer, Resettable Service Odometer and Hourmeter.
Several performance calculations include: 0-60 MPH (0-100 KPH) timer, ¼ mile timer, ¼ mile speed display, High Speed recall and High RPM recall.
Various Indicators can also be displayed such as: Turn Signals, High Beam, Check Engine, Parking Brake, Cruise Control, 4x4 (when equipped), Wait to Start (when equipped).
Automatic Transmission gear indicator is also included which will display the full name (ie: Park, Overdrive, etc.) of the current gear. Utilizing the gear position indicator will require the use of a Dakota Digital GSS-2000 sending unit.Dakota Digital instruments systems also include a Demonstration Mode which will cycle the instrument readouts while the vehicle is standing still. This is especially popular while the vehicle is on display at a show, event or simply displaying the instrument system.
Full Metric conversions will cycle between MPH or KPH with the press of a button. If full (Celsius & KPH) metric instrument systems are required, please specify upon ordering.
Necessary sensors included for oil pressure (1/8â€Â