Removal Procedure

IMPORTANT: The vehicle communication interface module (VCIM) has a specific set of unique numbers that tie the module to each vehicle. These numbers, the 10-digit station identification and the 11-digit electronic serial number, are used by the National Cellular Network and OnStar® to identify the specific vehicle. Because these numbers are tied to the vehicle identification number of the vehicle, you must never exchange these parts with those of another vehicle.

Disable the SIR. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM in SIR.
Remove the passenger inflatable restraint module. Refer to SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM in SIR.
Remove the I/P carrier bolts on the passenger side.
Remove the bolt (1) for the module bracket strap (7).
Remove the module bracket strap (7) from the mounting bracket (3).
Slide the module (2) upward in the mounting bracket.
IMPORTANT: The generation 5 module uses four connector cavities. In addition, the STID and the ESN information on the generation 5 label can not be used to update the customer account information if the module is replaced. Use a scan tool to access this information.

Fig 1: Removing Communication Interface Module (1 Of 3)
Courtesy of GENERAL MOTORS CORP.
Disconnect all the electrical connector (3) from the communication interface module (1).
Disconnect all the coaxial cable connectors (4) from the module (1).

Fig 2: Removing Communication Interface Module (2 Of 3)
Courtesy of GENERAL MOTORS CORP.
Pull downward on the back of the I/P compartment to remove the OnStar® module (2) from the bracket (3).
Remove the module (2) through the opening for the passenger inflator module.

Fig 3: Removing Communication Interface Module (3 Of 3)
Courtesy of GENERAL MOTORS CORP.