GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Avalanche - 4WD 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 Dual DVD Rear Seat Entertainment Headrest Audio Malfunction

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Reference Information

Schematic Reference

Video System Schematics

Connector End View Reference

Entertainment/Communication Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Circuit/System Testing

Dual DVD Rear Seat Entertainment Audio Inoperative

  1. Turn ON the ignition, Tune the radio to station 88.3, 88.7, 89.1, 89.5, 89.9, or 90.3MHz. Chose the station that has the least amount of regular audible radio reception.
  2. Press the power button on the headrest DVD display(s). Insert a DVD and operate the DVD player in play mode. Verify the DVD audio can not received on one of the above stations.
    3. ⇒If the DVD audio can be heard review the system operation with the customer.
  3. Verify the DVD player is in play mode.
  4. At the DVD control module, test for AC voltage between terminal 6 and terminal 3 or 4 with a DMM at the back of the black or red connector.
    5. ⇒If AC voltage is present replace the DVD control module.
  5. Turn the DVD player off and disconnect both connectors from the DVD display that was playing the DVD.
  6. Swap the two connectors on the display and swap the two corresponding connectors at the DVD control module. Verify the DVD audio now operates normally.
    7. ⇒If the DVD audio now operates normally, replace the DVD display harness.
    ⇒It the DVD audio is still inoperative replace the suspect DVD display.

Dual DVD Rear Seat Entertainment Audio Distorted

  1. Turn ON the ignition, Tune the radio to station 88.3, 88.7, 89.1, 89.5, 89.9, or 90.3MHz. Chose the station that has the least amount of regular audible radio reception.
  2. Press the power button on the headrest DVD display(s). Insert a DVD and operate the DVD player in play mode. Verify the DVD audio is distorted on one of the above stations.
    3. ⇒If the DVD audio can be heard review the system operation with the customer.
  3. Turn the DVD player off and disconnect both connectors from the DVD display that was playing the DVD.
  4. Swap the two connectors on the display and swap the two corresponding connectors at the DVD control module. Verify the DVD audio now operates normally.
    5. ⇒If the DVD audio now operates normally, replace the DVD display harness.
    ⇒If the DVD audio distortion persists, replace the DVD control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Refer to the accessory installation instructions for replacement.