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Home >> GMC >> 2001 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L - Repair Instructions >> Repair Instructions >> Powertrain Control Module Programming (On-Board) >> Programming Verification
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Programming Verification

  1. Clear the DTCs with a scan tool.
  2. Attempt to start the engine.
  3. Repeat the Service Programming procedure if the engine does not start or operates poorly. Perform the following procedures before programming the PCM:
    • Ensure the control module and DLC connections are OK.
    • Ensure the Techline operating software is up to date.
    • Ensure the calibration part number is correct for the vehicle.
  4. Attempt to program the control module. If the control module still cannot be programmed properly, replace the control module. Refer to Powertrain Control Module Replacement . You must program the replacement control module.
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