Envoy 2WD V8-5.3L VIN P (2004)
Navigation Module: Service and Repair
Communication Interface Module Replacement
COMMUNICATION INTERFACE MODULE REPLACEMENT
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
