GM Service Manual Online
For 1990-2009 cars only

Antenna Assembly Replacement UV8

Removal Procedure

Caution: Refer to SIR Caution in the Preface section.


    Object Number: 657863  Size: SH
  1. Remove the rear seat back. Refer to Rear Seat Back Replacement in Seats.
  2. Remove the right side sail panel. Refer to Sail Panel Replacement in Interior Trim.
  3. Disconnect the cellular phone antenna cable connection (1), located behind the rear seat back.
  4. Remove the rear shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement in Interior Trim.

  5. Object Number: 657860  Size: SH
  6. Remove the rear window defroster/cellular phone antenna ground fastener (1) which grounds the cellular phone antenna and the rear window defroster.
  7. The rear window defroster/cellular phone antenna ground fastener (1) is located behind the right side sail panel.


    Object Number: 657857  Size: SH

    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.

  8. Peel the cellular phone antenna (1) from the inside surface of the backglass.
  9. A razor blade or a putty knife may be necessary in order to remove the antenna from the backglass.

  10. Remove the cellular phone antenna from the vehicle.

Installation Procedure


    Object Number: 657863  Size: SH
  1. Connect the cellular phone antenna cable connection (1).

  2. Object Number: 657860  Size: SH
  3. Install the cellular phone antenna cable / rear window defroster ground fastener (1) through the cellular phone and rear window defroster ground eyelet.
  4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the cellular phone antenna cable ground/rear window defroster fastener (1) to the body.
  6. Tighten
    Tighten the fastener to 9 N·m (80 lb in).


    Object Number: 702930  Size: SH
  7. Clean the inside surface of the backglass, where the cellular phone antenna is to be mounted, below the defroster grid on the right side of the vehicle.
  8. Important: The new cellular phone coaxial antenna cable and the cellular phone antenna loop will need to be assembled.

    Ensure the new antenna cable is attached to the antenna loop on the printed side, the side of the loop opposite the paper film that is peeled to adhere the antenna to the backglass, in order to ensure the electrical connection to the cellular phone antenna.

    Ensure the contacts touch the metal strips on the antenna loop.

    If the electrical connection to the antenna loop is not properly attached the cellular phone will have poor or no reception when the phone is docked and plugged into the vehicle system.

  9. Assemble the new antenna cable to the new antenna loop.
  10. Use soapy water when installing the cellular phone antenna to the backglass in order to ease installation and allow for positioning of the antenna during installation.
  11. A small amount of dish soap works well for this application.

  12. Install the cellular phone antenna to the inside of the backglass, 102 mm (4 in) (a) from the blackout line on the right side and approximately 9.5 mm (3/8 in) (b) below the defroster grid.
  13. Clean excess soapy water from the backglass.
  14. Install the rear shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement in Interior Trim.
  15. Install the right side sail panel. Refer to Sail Panel Replacement in Interior Trim.
  16. Install the rear seat back. Refer to Rear Seat Back Replacement in Seats.