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Home >> GMC >> 1991 >> Forward Control 7.4 N >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Except C/K Series Pickups >> Removal & Installation >> Speedometer/Odometer

Removal & Installation: Speedometer/Odometer

Integrated circuits control needle-type air core speedometer, and stepper motor-driven odometer. Speedometer/odometer receives its signals from the Digital Ratio Adapter Controller (DRAC), which receives its input signals from the Vehicle Speed Sensor (VSS).