GM Service Manual Online
For 1990-2009 cars only

Review the Radio/Audio System Description and Operation in order to familiarize yourself with the system functions.

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.

Symptom List

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

    •  Radio Displays CAL or CAL ERR
    •  Radio Displays CLN or CLEAN
    •  Radio Displays LOC, LOCKED, or CODE
    •  Radio Poor Reception
    •  Speaker Malfunction
    •  Tape Player Weak, Slow, or Garbled Output