Trailblazer EXT, Envoy XL

REMOVAL PROCEDURE

IMPORTANT: Do not exchange the vehicle communication interface module with other vehicles. Each vehicle communication interface module has a specific station identification (STID) and electronic serial number (ESN). These identification numbers are stored in the General Motors vehicle history files by VIN and used by OnStar(R) and the National Cellular Telephone Network.




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.

INSTALLATION PROCEDURE




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.

IMPORTANT: Pressing and holding the white dot button on the keypad will not reset this version of the OnStar system. This action will cause a DTC to set.

9. If replacing the VCIM, perform the following:
9.1. Install the scan tool. Use the special functions menu in order to perform the OnStar setup procedure for this vehicle.
9.2. 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.
9.3. Use the ID Information, Module 2 screen of the scan tool in order to access the new station ID and electronic serial number from the new VCIM.
9.4. Press the blue OnStar button twice to connect to OnStar. Tell the advisor that this vehicle has received a new VCIM. Ask the advisor to add the new STID and ESN to the customer's account.
9.5. Follow any additional instructions from the OnStar advisor.