LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 559 (Cellular Communication System) >> Repair Instructions >> Communication Interface Module Replacement >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation Procedure

WARNING: This page is about a different car, the 2004 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
  1. When replacing a VCIM, record the 11-digit electronic serial number (ESN) and the 10-digit station identification (STID) number from the label on the new VCIM.
    2. Fig 1: Communication Interface Module
    GM865085Courtesy of GENERAL MOTORS CORP.
  2. Connect the electrical and the antenna connections to the communication interface module.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
    Fig 2: Communication Interface Module & I/P
    GM815865Courtesy of GENERAL MOTORS CORP.
  3. Install the communication interface module screws.

    Tighten:  Tighten the screws to 2 N.m (18 lb in).

  4. Install the I/P center trim panel. Refer to Trim Panel Replacement - Instrument Panel (I/P) Center in Instrument Panel, Gages, and Console.
    5. IMPORTANT: After replacing the vehicle communication interface module, you must reconfigure the OnStar® system. Failure to reconfigure the system will result in an additional customer visit for repair. In addition, pressing and holding the white dot button on the keypad will NOT reset this version of the OnStar® system. This action will cause a DTC to set.
  5. Reconfigure the OnStar® system. Refer to OnStar Reconfiguration .
scientia non olet · About LEMON Manuals