Removal Procedure

WARNING: This page is about a different car, the 2002 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.

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 are used by OnStar® and the National Cellular Telephone Network.

Remove the rear compartment trim. Refer to COMPARTMENT TRIM PANEL REPLACEMENT - REAR .
Remove the electrical component mounting bracket nuts (2).

Fig 1: Removing Electrical Component Mounting Bracket Nuts
Courtesy of GENERAL MOTORS CORP.

NOTE: DO NOT completely remove the electrical component mounting bracket until the GPS antenna cable is removed from the cross car brace. Failure to do so may result in damage to the GPS connector.
Carefully pull the electrical component mounting bracket (1) away from the body, so that the cross car brace is visible.
Remove the GPS antenna cable (1) from the cross car brace.
Place the electrical component mounting bracket (2) module side up in the rear compartment.

Fig 2: Removing GPS Antenna Cable & Electrical Component Mounting Bracket
Courtesy of GENERAL MOTORS CORP.
Release the vehicle communication interface module (VCIM) (3) retaining tab (2).
Slide the vehicle VCIM (3) out of the electrical component mounting Bracket (1).
Disconnect the antenna and electrical connections from the VCIM (3).

Fig 3: Removing VCIM, Electrical Component Mounting Bracket & Retaining Tab
Courtesy of GENERAL MOTORS CORP.