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Home >> Pontiac >> 2004 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Engine Control System - 4.8L, 5.3L, & 6.0L - 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 Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Disconnecting/Connecting PCM Electrical Connectors
    GM899717Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  1. Connect the PCM electrical connectors.
  2. Tighten the PCM electrical connector bolts.

    Tighten:  Tighten the bolts to 8 N.m (71 lb in).

    3. Fig 2: Removing/Installing PCM
    GM899716Courtesy of GENERAL MOTORS CORP.
  3. Install the PCM.
  4. Ensure that the PCM mounting tabs are engaged.
  5. Secure the spring latch to the PCM.
    6. Fig 3: Removing/Installing PCM Cover
    GM899715Courtesy of GENERAL MOTORS CORP.
  6. Install the PCM cover and cover retainers if previously removed.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  8. If the PCM was replaced, the replacement PCM must be programmed. Refer to Service Programming System (SPS) in Programming.
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