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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 243 (CELLULAR COMMUNICATION SYSTEM)REPAIR INSTRUCTIONSCOUPLING REPLACEMENT - ANTENNA INNERINSTALLATION PROCEDURE
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Installation Procedure

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Installation Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clean the inside of the rear window with an alcohol wipe.
  2. Dry the glass thoroughly using a lint free cloth.

    Important: 

    • The adhesion promoter must be used to assure adequate bonding of the coupling.
    • Mask off or protect areas before applying the adhesion promoter.
  3. Apply Glass Adhesion Promoter GM P/N 12378555 (Canadian P/N 88901239) to the rear window in the area where you will install the antenna coupling. Follow the Glass Adhesion Promoter instructions on the product label.
    Fig 1: Cleaning & Drying Rear Window Glass
    G02422520Courtesy of GENERAL MOTORS CORP.

    Important: 

    • The RF connections for the inner antenna coupling should run parallel to the defogger gridline.
    • Align the inner and the outer antenna couplings.
    • Do not touch the adhesive backing on the antenna coupling.
  4. Remove the protective film from the adhesive backing on the inner antenna coupling (2).
  5. Align the inner antenna coupling (2) to the existing exterior coupling.
  6. Connect the coaxial cable to the inner coupling (1).
    Fig 2: Installing Inner Antenna Coupling & Connecting Coaxial Cable
    G02422521Courtesy of GENERAL MOTORS CORP.
  7. Press firmly on all 4 corners and on the center of the antenna inner coupling (2) in order to ensure proper adhesion to the rear window (4). Hold pressure on the inner coupling (2) for 10-30 seconds.
  8. Ensure that no gaps occur between the couplings (5,2) and the rear window (4).
  9. Keep the vehicle dry. Allow 6 to 8 hours, at 15°C (60°F), for the adhesive to cure after installation.
    Fig 3: Ensuring Proper Adhesion Of Antenna Inner Coupling
    G02422522Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.