GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Important: 

       • Use adhesion promoter to ensure adequate bonding of the coupling.
       • To obtain maximum adhesion between the new mobile antenna couplings and the glass surface, the couplings and the glass must be kept dry and above 15°C (60°F) during installation. Allow 6 to 8 hours, at 15°C (60°F), for the adhesive to cure after installation. Otherwise, the new couplings may not adhere.
       • Do not attempt to reinstall the original cellular antenna exterior coupling or inner coupling using any type of glue, adhesive tapes, etc. Doing so may eliminate the cellular signal transfer through the glass and reduce the maximum performance of the system, including the air bag deployment notification.


    Object Number: 650826  Size: SH
  1. Install the inner coupling first if both the inner and the outer coupling are to be replaced. Refer to Mobile Telephone Antenna Inner Coupling Replacement .
  2. Notice: If you use a razor blade or other sharp tool in order to remove the adhesives or foreign objects from the inside of the rear window, use the blade carefully. Damage to the grid lines may result.

  3. Use a small wide-bladed plastic tool to cut the double back tape material while lifting up on the outer antenna coupling (5).

Installation Procedure


    Object Number: 569466  Size: SH
  1. Clean back glass with an alcohol wipe.
  2. Dry the glass thoroughly using a lint free cloth.
  3. Apply Glass Adhesion Promoter GM P/N 12378555 (Canadian P/N 88901239) to the back glass in the area where you will install the antenna coupling.
  4. Follow the Glass Adhesion Promoter instructions on the product label.

    Important: 

       • Align the inner and outer antenna couplings.
       • Do not touch the adhesive backing on the antenna coupling.

  5. Remove the protective film from the adhesive backing on the outer antenna coupling.

  6. Object Number: 650826  Size: SH
  7. Align the outer antenna coupling to the inner antenna coupling.
  8. Press firmly on all 4 corners and on the center of the antenna outer coupling (5) in order to ensure proper adhesion to the back glass (4).
  9. Hold pressure on the outer coupling (5) for 10-30 seconds.

  10. Ensure that no gaps occur between the couplings (5, 2) and the back glass (4).
  11. Keep the vehicle dry. Allow 6-8 hours, at 15°C (60°F), for the adhesive to cure after installation.