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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Automatic Transmission Diagnosis - ALLISON) >> Removal & Installation >> Powertrain Control Module >> Removal

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. Release the PCM cover mounting holes (1, 5) away from the mounting tabs on the PCM mounting bracket. See Figure.
  2. Release the PCM cover (8) from the mounting bracket.
  3. Remove the PCM cover.
    4. CAUTION: Do not touch the connector pins or soldered components on the circuit board to prevent possible electrostatic discharge damage to the PCM.
  4. Disconnect the PCM harness connectors (6).
  5. Release the spring latch (2) from the PCM.
  6. Release the PCM mounting tabs (3) from the PCM.
  7. Remove the PCM (4) from the engine compartment.
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