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Powertrain Control Module: Removal

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure ignition is off. Disconnect negative battery cable. Locate PCM at left front corner of engine compartment. See Fig 1. Remove harness ground from the clip attached to the PCM cover (if equipped).
  2. Release PCM cover from mounting tabs on PCM bracket. Remove PCM cover from PCM. Loosen PCM harness connector bolts. See Fig 2. Disconnect PCM harness connectors. Release the PCM spring latch. Remove PCM.
Fig 1: Locating PCM
G00156231Courtesy of GENERAL MOTORS CORP.
Fig 2: Removing/Installing PCM
G00156232Courtesy of GENERAL MOTORS CORP.
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