GM Service Manual Online
For 1990-2009 cars only

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to Radio/Audio System Description , Radio/Audio System Operation , Radio/Audio System Operation-Theftlock ,and Radio/Audio System Circuit Description .

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the Radio/Audio system. Refer to Checking Aftermarket Accessories in Wiring Systems.
    • 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
    •  Remote Playback Device Inoperative
    •  Remote Playback Device - Audio Noise
    •  Remote Playback Device Left or Right Channel Inoperative
    •  Radio Displays LOC, LOCKED, or CODE
    •  Radio Displays CLN or CLEAN
    •  Radio Display Inoperative, Speakers Operative
    •  Radio Display Inoperative, No Sound from Speakers
    •  Speed Compensated Volume
    •  Steering Wheel Controls Inoperative
    •  Radio Audio Inoperative at Rear Seat Audio (RSA) Control