GM Service Manual Online
For 1990-2009 cars only

For the DE 100 series radio, complete the following procedure, with the key in the ON position use a scan tool, in order to properly set up communication:

  1. At the Main Menu screen, select Diagnostics.
  2. At the Vehicle Identification screen, select the following options:
  3. 2.1. Model Year
    2.2. LD Trk, MPV
  4. At the System Selection Menu screen, select Body.
  5. At the Vehicle Identification screen select the following:
  6. • Platform Type
    • Body Type
    • HVAC system-If multiple HVAC systems exist on this platform
  7. At the Body screen, select Radio.
  8. Select Special Functions.
  9. At the Special Functions screen, select VIN Relearn.
  10. Begin the VIN Relearn process by selecting "Begin Clearing".