Removal Procedure

WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

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 SIR Disabling and Enabling Zone 5 in SIR.
Remove the passenger inflatable restraint module. Refer to Inflatable Restraint Instrument Panel Module Replacement 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).

Fig 1: Removing Module Bracket Strap Bolt
Courtesy of GENERAL MOTORS CORP.
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.
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: Disconnecting Communication Interface Module Electrical Connectors
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 OnStar® Module
Courtesy of GENERAL MOTORS CORP.