Diagnostic Aids

The DIC displays SC when there is a shorted condition within the system.
For intermittent diagnosis, refer to TESTING FOR INTERMITTENT & POOR CONNECTIONS in Wiring Systems.
Refer to Ambient Air Temperature Sensor Resistance in order to verify the correct ambient temperature sensor readings.

Fig 1: Driver Information Center (DIC) Temperature Display Always Reads SC Symptom Table

Courtesy of GENERAL MOTORS CORP.