Cellular Communication System: Removal & Installation Chevrolet RV Cutaway G3500

Removal Procedure

1. Disconnect the coaxial cable (1) from the inner coupling (2) of the mobile communication antenna.
2. Use a small wide-bladed plastic tool to cut the double-back tape material while lifting up on the inner antenna coupling (2).

Installation Procedure

1. Clean the inside of the rear window 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 rear window in the area where you will install the antenna coupling. Follow the Glass Adhesion Promoter instructions on the product label.
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).
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.

1. Install the inner coupling first if both the inner and the outer (1) couplings are to be replaced. Refer to «Coupling Replacement - Antenna Inner»(ref-197820-S07853398982005101300000) .
2. Use a small wide-bladed plastic tool to cut the double back tape material while lifting up on the outer antenna coupling (1).

1. Clean the rear window 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 rear window in the area where you will install the antenna coupling. Follow the Glass Adhesion Promoter instructions on the product label.
4. Remove the protective film from the adhesive backing on the outer antenna coupling.
5. Align the outer antenna coupling to the inner antenna coupling.
6. Press firmly on all 4 corners and on the center of the antenna outer coupling (5) in order to ensure proper adhesion to the rear window (4). Hold pressure on the outer coupling (5) for 10-30 seconds.
7. Ensure that no gaps occur between the couplings (5,2) and the rear window (4).
8. Keep the vehicle dry. Allow 6 to 8 hours, at 15°C (60°F), for the adhesive to cure after installation.

1. Ensure the ignition is in the OFF position.
2. Remove the electrical connector from the antenna.
3. While maintaining a parallel angle to the windshield, remove the antenna from the bracket by sliding the antenna away from the headliner.

1. Position the antenna to the bracket.
2. While maintaining a parallel angle to the windshield, install the antenna to the bracket by sliding the antenna towards the headliner. Ensure the antenna is fully seated to the bracket.
3. Install the electrical connector to the antenna.

1. Remove the drivers knee bolster. Refer to «Knee Bolster Replacement - Left»(ref-197831-S09801401302005101300000) in Instrument Panel, Gages, and Console.
2. Disconnect the coaxial cable and the electrical connectors (2) from the module.
3. Remove the bolts (3) retaining the module bracket to the instrument panel (I/P).
4. Remove the module and bracket (2) from the vehicle.
5. Release the tab (2) on the mounting bracket and pull that end of the module (3) away from the bracket.
6. Slide the module (3) out of the mounting bracket (1).

1. Slide the module (3) into the mounting bracket (1).
2. Push the module (3) towards the mounting bracket (1) at the end near the tab (2). Push until the module (3) is seated in the mounting bracket (1).
3. Install the module and bracket (2) to the I/P.
4. Install the bolts (3). Tighten: Tighten the bolts (3) to 3 N.m (27 lb in).
5. Connect the coaxial cable and the electrical connectors (2) to the module.
6. Install the drivers knee bolster. Refer to «Knee Bolster Replacement - Left»(ref-197831-S09801401302005101300000) in Instrument Panel, Gages, and Console.

1. Remove the drivers knee bolster. Refer to «Knee Bolster Replacement - Left»(ref-197831-S09801401302005101300000) in Instrument Panel, Gages and Console.
2. Disconnect the electrical connectors and the coaxial cable (2) from the module.
3. Release the communication interface module retaining tab (1).
4. Remove the communication interface module (3) from the module bracket.

1. When replacing a VCIM, record the 11-digit electronic serial number (ESN) and the 10-digit station identification (STID) number from the label on the new VCIM.
2. Slide the communication interface module (3) into the bracket.
3. Push in on the module (3) at the retaining tab (2) until an audible click is heard indicating the module is secured to the bracket.
4. Connect the electrical connectors and the coaxial cable (2) to the communication interface module (3).
5. Reconfigure the OnStar® system. Refer to «OnStar Reconfiguration (Gen 6)»(ref-197820-S24202178082005101300000) or «OnStar Reconfiguration (Gen 6.1)»(ref-197820-S02266849182005101300000) .

1. Remove the passenger windshield garnish molding. Refer to «Windshield Garnish Molding Replacement»(ref-197833-S15431139842005101300000) in Interior trim.
2. Disconnect the microphone electrical connector (1).
3. Remove the front headliner. Refer to «Headliner Replacement - Front»(ref-197833-S29938910512005101300000) in Interior Trim.
4. Release the microphone wiring from the glue spots on the headliner.
5. Grasp the microphone (1) and rotate clockwise in order to release the microphone (1) from the headliner.
6. Remove the microphone (1) and wiring from the headliner.

1. Feed the microphone (1) wire through the hole in the headliner.
2. Align the microphone (1) with the hole in the headliner and install the microphone in the opening.
3. Rotate the microphone (1) counter clockwise to secure.
4. Glue or tape the microphone wiring to the headliner.
5. Install the front headliner. Refer to «Headliner Replacement - Front»(ref-197833-S29938910512005101300000) in Interior Trim.
6. Connect the microphone electrical connector (1).
7. Install the passenger windshield garnish molding. Refer to «Windshield Garnish Molding Replacement»(ref-197833-S15431139842005101300000) in Interior trim.