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Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - A/T >> Testing & Diagnosis (REATTA, Riviera, TORONADO & TROFEO) >> Status Light Indicators >> High

Status Light Indicators: High

Indicator light will be on when ECM is in closed loop fuel control. Light comes on only after coolant and O2 sensors reach operating temperature.



Indicator light will be on when BCM commands airflow out floor outlets. Light should be on in heater mode.