GM Service Manual Online
For 1990-2009 cars only

Important: Review the Radio/Audio System Description and Operation in order to familiarize yourself with the system functions, and Audio System Troubleshooting Hints for help diagnosing symptoms.

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the Radio/Audio System.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

    •  Audio System Troubleshooting Hints
    •  Radio Poor Reception
    •  Radio Displays LOC, LOCKED, or CODE
    •  Radio Displays CLN or CLEAN
    •  Radio Displays CAL or CAL ERR
    •  Tape Player Weak, Slow, or Garbled Output
    •  Speakers Inoperative - One or More