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 and Operation.

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the Radio/Audio system. Refer to Checking Aftermarket Accessories.
    • 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:

    •  Speaker Malfunction
    •  Audio/Video Disc Player Adapter - Audio or Video Inoperative or Degraded Quality
    •  Dual DVD Rear Seat Entertainment Headrest Display Malfunction
    •  Dual DVD Rear Seat Entertainment Headrest Audio Distorted or Inoperative
    •  Dual DVD Rear Seat Entertainment Headrest Wireless Headphones Inoperative
    •  Dual DVD Rear Seat Entertainment Headrest Remote Inoperative
    •  Noise Compensated Volume Inoperative
    •  Radio Audio Inoperative at Rear Seat Audio (RSA) Control
    •  Radio Displays LOC, LOCKED, or CODE
    •  Radio Displays CAL or CAL ERR
    •  Radio Poor Reception
    •  Rear Seat Radio Controls Inoperative
    •  Video Display is Poor or Blank
    •  Video Entertainment System Inoperative
    •  Video Entertainment System Remote Control Inoperative
    •  Video Entertainment System Wireless Headphone Inoperative