1999 Chevrolet Cutaway 7.4 JFACTORY OEM SERVICE PROCEDURE

Programming Verification

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana Special, 2001 GMC Savana Camper Special, and 2001 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using scan tool, clear DTCs.
  2. Attempt to start engine.
  3. Repeat Service Programming procedure if 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(R) 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 control module.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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