Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. 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 .
Disconnect the antenna (2) and electrical connections (3) from the vehicle communication interface module (VCIM) (4).

Fig 1: Locating VCIM
Courtesy of GENERAL MOTORS CORP.
Release the VCIM retaining tabs (1).
Slide the vehicle VCIM (4) out of the electrical component mounting bracket.