Cellular Communication System: Removal & Installation GMC Envoy II

Removal Procedure

1. Lower the front portion of the headliner. Refer to «Headliner Replacement (Envoy XUV)»(ref-200370-S26489428372005102000000) or «Headliner Replacement (TrailBlazer EXT, Envoy XL)»(ref-200370-S17161678162005102000000) or «Headliner Replacement (Trailblazer, Envoy, Rainier)»(ref-200370-S15575918612005102000000) in Interior Trim.
2. Disconnect the electrical connectors from the antenna assembly.
3. Loosen the retaining nut until the assembly can be removed from the roof panel.
4. Using an upward motion, remove the antenna assembly from the roof.

Installation Procedure

1. Install the antenna assembly from the top of the roof.
2. Lower the antenna assembly to the roof panel, ensuring the anti-rotation pin is properly indexed.
3. Tighten the retaining nut. Tighten: Tighten the nut to 6 N.m (53 lb in).
4. Connect the antenna electrical connectors.
5. Install the headliner. Refer to «Headliner Replacement (Envoy XUV)»(ref-200370-S26489428372005102000000) or «Headliner Replacement (TrailBlazer EXT, Envoy XL)»(ref-200370-S17161678162005102000000) or «Headliner Replacement (Trailblazer, Envoy, Rainier)»(ref-200370-S15575918612005102000000) in Interior Trim.

Scheme 8

The OnStar® ® button assembly located on the inside rearview mirror can not be serviced separately. Should the button assembly need to be replaced, the entire inside rearview mirror assembly will need to be replaced. Refer to Rearview Mirror Replacement in Stationary Windows.

1. Fold and tumble the right second row seat to a cargo position.
2. Remove the protective cover (1) from the vehicle communication interface module (VCIM).
3. Remove the VCIM from the bracket by releasing the retaining tab (1).
4. Remove the electrical connectors from the VCIM.
5. Remove the VCIM from the vehicle.

1. If replacing the VCIM, record the 10-digit STID number, and the 11-digit ESN number from the labels on the new module.
2. Position the VCIM near the mounting location.
3. Install the quick connector to the VCIM.
4. Install the remaining electrical connectors to the VCIM.
5. Install the VCIM (1) to the bracket.
6. Ensure the retaining tab (1) is fully seated.
7. Install the protective cover (1) to the module.
8. Position the right second row seat to a passenger position.
9. Install the scan tool. Use the special functions menu in order to perform the OnStar® setup procedure for this vehicle.
10. Move the vehicle to an open area that is away from tall buildings and with a clear view of unobstructed sky. Allow the vehicle to run for 10 minutes.
11. Use the ID information menu on the scan tool to access the new station ID (STID) and the electronic serial number (ESN) from the new VCIM.
12. Press the blue OnStar® button to connect to the OnStar® Call Center and perform the following procedure: Tell the advisor that this vehicle has received a new VCIM. Ask the advisor to add the new STID and the ESN to update the customer's account. Follow any additional instructions from the OnStar® advisor. Ask the advisor to activate the OnStar® Personal Calling feature, if available.

1. Position the right rear seat bottom to a cargo position.
2. Remove the protective cover from the vehicle communication interface module (VCIM).
3. Remove the module from the upper bracket by releasing the retaining tab.
4. Remove the electrical connectors from the VCIM.
5. Remove the VCIM from the vehicle

1. If replacing the VCIM, record the 10-digit STID number, and the 11-digit ESN number from the labels on the new module.
2. Install the module to the upper bracket ensuring the retaining tab is fully seated.
3. Connect the 2 electrical connectors. Tighten: Tighten the module thumb screw to a maximum of 0.2 N.m (2 lb in).
4. Install the protective cover to the module.
5. Position the right rear seat bottom to a passenger position.
6. Install the scan tool. Use the special functions menu in order to perform the OnStar® setup procedure for this vehicle.
7. Move the vehicle to an open area that is away from tall buildings and with a clear view of unobstructed sky. Allow the vehicle to run for 10 minutes.
8. Use the ID information menu on the scan tool to access the new station ID (STID) and the electronic serial number (ESN) from the new VCIM.
9. Press the blue OnStar® button to connect to the OnStar® Call Center and perform the following procedure: Tell the advisor that this vehicle has received a new VCIM. Ask the advisor to add the new STID and the ESN to update the customer's account. Follow any additional instructions from the OnStar® advisor. Ask the advisor to activate the OnStar® Personal Calling feature, if available.

1. Fold and tumble the right rear seat to a cargo position.
2. Leaving the electrical connectors attached, remove the communication interface module from the vehicle communication interface module (VCIM) bracket. Refer to «Communication Interface Module Replacement (TrailBlazer EXT, Envoy XL)»(ref-200363-S12650733242005102000000) or «Communication Interface Module Replacement (Trailblazer, Envoy, Rainier)»(ref-200363-S32269709242005102000000) in Interior Trim.
3. Using a flat bladed tool, release the retaining tab (1) on the VCIM bracket.
4. Slide the VCIM bracket rearward until the retaining tabs are released from the seat bracket.
5. Remove the VCIM bracket from vehicle.
6. Slide the VCIM bracket rearward until the retaining tabs are released from the seat bracket.
7. Remove the VCIM bracket from vehicle.

1. Position the VCIM bracket to the seat bracket.
2. Slide the VCIM bracket forward until the retaining tabs become locked to the seat bracket.
3. Ensure the retaining tab (1) on the VCIM bracket is properly seated.
4. Install the communication interface module. Refer to «Communication Interface Module Replacement (TrailBlazer EXT, Envoy XL)»(ref-200363-S12650733242005102000000) or «Communication Interface Module Replacement (Trailblazer, Envoy, Rainier)»(ref-200363-S32269709242005102000000) in Interior Trim.
5. Position the right second row seat to a passenger position.

1. Remove the right rear seat cushion. Refer to «Seat Cushion Replacement - Rear No. 1 (TrailBlazer, Envoy, Rainier)»(ref-200356-S20788909872005102000000) .
2. Remove the communication interface module. Refer to «Communication Interface Module Replacement (TrailBlazer EXT, Envoy XL)»(ref-200363-S12650733242005102000000) or «Communication Interface Module Replacement (Trailblazer, Envoy, Rainier)»(ref-200363-S32269709242005102000000) .
3. Using a flat bladed tool, release the retaining tab on the upper bracket.
4. Slide the upper bracket inboard until the retaining tabs are released from the processor bracket.
5. Remove the upper bracket from the processor bracket.
6. Remove the nut that retains the processor bracket to the rear seat back stud.
7. Remove the processor bracket from the vehicle.

1. Install the processor bracket to the rear seat studs.
2. Install the nut to the rear seat back stud. Tighten: Tighten the nut to 45 N.m (33 lb ft).
3. Position the upper bracket to the processor bracket.
4. Slide the upper bracket outboard until all the retaining tabs are seated to the processor bracket.
5. Install the communication interface module. Refer to «Communication Interface Module Replacement (TrailBlazer EXT, Envoy XL)»(ref-200363-S12650733242005102000000) or «Communication Interface Module Replacement (Trailblazer, Envoy, Rainier)»(ref-200363-S32269709242005102000000) .
6. Install the right rear seat cushion. Refer to «Seat Cushion Replacement - Rear No. 1 (TrailBlazer, Envoy, Rainier)»(ref-200356-S20788909872005102000000) .

1. Remove the overhead console. Refer to «Console Replacement - Overhead (Envoy XUV)»(ref-200370-S31327412472005102000000) or «Console Replacement - Overhead (Trailblazer, Envoy, Rainier)»(ref-200370-S24836168992005102000000) in Interior Trim.
2. Disconnect the microphone electrical connector to the OnStar® microphone (1).
3. If only the microphone removal is required, disengage the quick release tab (1) and remove the OnStar® microphone from the overhead console.
4. If removing the mounting bracket is required, remove the 2 retaining screws to the OnStar® microphone and remove the bracket from the overhead console.

1. If installation of the mounting bracket is required, install the mounting bracket to the overhead console.
2. Install the 2 OnStar® microphone retaining screws. Tighten: Tighten the screws to 0.8 N.m (7 lb in).
3. Install the microphone to the mounting bracket ensuring the quick release tab (1) is fully seated.
4. Connect the electrical connector to the OnStar® microphone (1).
5. Install the overhead console. Refer to «Console Replacement - Overhead (Envoy XUV)»(ref-200370-S31327412472005102000000) or «Console Replacement - Overhead (Trailblazer, Envoy, Rainier)»(ref-200370-S24836168992005102000000) in Interior Trim.