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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 248 (Engine Controls - Trouble Shooting - No Codes - 3.4L) >> INTERMITTENTS >> Intermittent Conditions >> Incorrect PCM Programming

Incorrect PCM Programming

WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, 2003 Chevrolet Monte Carlo, and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: DO NOT re-program the PCM with the SAME software/calibration files that are already present in the PCM. This is not an effective repair for any type of driveability condition.
  1. There are only a few situations where reprogramming a PCM is appropriate:
    • A new service PCM is installed.
    • A PCM from another vehicle is installed.
    • Revised software/calibration files have been released for this vehicle.

Verify that the PCM contains the correct software/calibration. If incorrect programming is found, reprogram the PCM with the most current software/calibration. Go to POWERTRAIN CONTROL MODULE under PROGRAMMING in SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - 3.4L ALERO, GRAND AM, IMPALA & MONTE CARLO article.

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