Installation Procedure

Clean the inside of the back glass with an alcohol wipe.

Fig 1: Cleaning Inside Of Back Glass With Alcohol Wipe
Courtesy of GENERAL MOTORS CORP.
Dry the glass thoroughly using a lint free cloth.
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.
Follow the Glass Adhesion Promoter instructions on the product label.
IMPORTANT:
- The RF connections for the inner antenna coupling should run parallel to the defogger gridline.
- Align the inner and outer antenna couplings.
- Do not touch the adhesive backing on the antenna coupling.
If the exterior coupling is not installed, mark the inner antenna coupling location (A) 92 mm (3.75 in) and (B) 80 mm (3.25 in) with a grease pencil on the exterior surface of the rear window.
Remove the protective film from the adhesive backing on the inner antenna coupling.
Align the inner antenna coupling to the locating marks on the back glass or the exterior coupling.

Fig 2: Identifying Inner Antenna Coupling Location
Courtesy of GENERAL MOTORS CORP.
Press firmly on all 4 corners and on the center of the antenna inner coupling (2) in order to ensure proper adhesion to the back glass (4).
Hold pressure on the inner coupling (2) for 10-30 seconds.

Fig 3: View Of Inner & Outer Antenna Coupling
Courtesy of GENERAL MOTORS CORP.
Ensure there are not any gaps between the couplings (5, 2) and the back glass (4).
Connect the coaxial cable to the inner coupling.

Fig 4: Connecting Coaxial Cable To Inner Coupling
Courtesy of GENERAL MOTORS CORP.
Keep the vehicle dry. Allow 6-8 hours, at 15°C (60°F), for the adhesive to cure after installation.