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Home >> GMC >> 2004 >> Sonoma >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Controls - 4.3L - Introduction) >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Installation Procedure
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Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Safari and 2004 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the PCM (1) to the PCM mounting tray (2).
    Fig 1: View Of PCM Mounting Tray
    GM718097Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Secure the spring latch (3) to the PCM (1).
  3. Connect the PCM connectors (4) to the PCM (1).

    Tighten:  Tighten the PCM connector end fasteners to 8 N.m (71 lb in).

    Fig 2: Identifying PCM Components
    GM718096Courtesy of GENERAL MOTORS CORP.
  4. If a new PCM is being installed, program the PCM. Refer to Service Programming System (SPS) .