Diagnostic Aids

WARNING: This page is about a different car, the 2002 GMC Safari and 2002 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

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.