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Home >> GMC >> 2001 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1477 (Engine Controls - 6.5L) >> Repair Instructions >> Powertrain Control Module (PCM) Programming >> PCM Programming

PCM Programming

WARNING: This page is about a different car, the 2002 GMC C3500 HD and 2002 Chevrolet C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the following for the setup:
    • The battery is charged.
    • The ignition is ON.
    • The battery/cigarette lighter connection is secure.
    • The data link connector (DLC) is attached.
  2. Perform the programming. Refer to the up to date Techline terminal/equipment for user instructions.
  3. Perform the Passlock Learn Procedure. Refer to PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS .
  4. After the vehicle has been programed, operate the vehicle until the coolant temperature is more than 77°C (170°F). This will allow the top dead center (TDC) offset to be programed. Refer to Programming the TDC Offset  below.
  5. Check the Data list for a TDC offset.
  6. If the PCM fails to reprogram, do the following:
    • Check all the powertrain control module (PCM) connections.
    • Check the Techline terminal/equipment for the latest software version.
    • Try again to reprogram the PCM. If the PCM fails again, replace the PCM. Refer to Powertrain Control Module (PCM) Replacement .
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