GM Service Manual Online
For 1990-2009 cars only

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

Description and Operation

Radio/Audio System Description and Operation

Special Tools

J 39916-A CD and Cassette Diagnostic Audio Kit

Circuit/System Verification

  1. Radio ON, With the J 39916-A clean the cassette player.
  2. Reset the display by pushing and holding the eject button for 5 seconds. Verify radio does not display CLN or CLEAN.
  3. If radio does display CLN or CLEAN, replace the radio.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Radio replacement, setup, and programming