2003 PONTIAC GRAND AM PCM

  • Tiny
  • joedsmith
  • 2003 Pontiac Grand Am
  • 3.4L
  • 6 CYL
  • FWD
  • automatic
  • 124,000 miles

I just bought a PCM from a local parts store. I had to give them the VIN #, mileage, etc. I was informed that it would be flashed.
After installing it. The engine would not crank.
A to

10 minute relearn procedures was done for the passlock. Fuel pump operates, gauges work.

What am I doing wrong?

Thursday, June 5th, 2014 AT 8:34 PM

4 Answers

  • Tiny
  • Wrenchtech
  • Expert
  • 19,840 posts

I seriously doubt that is completely programmed out of the car. That usually has to be done in the car. Do you have a security light on or flashing when you try to start it? I would also suspect that this will require the 30 minute relearn procedure rather than the 10 minute.

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Friday, June 6th, 2014 AT 2:36 AM
  • Tiny
  • joedsmith
  • Member

I wasn't aware if a 30 minute process.
Can you provide instructions?

The security light was on steady the entire time. Everything else seemed to be normal. Reinstalled the original PCM, engine cranked and started.

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Friday, June 6th, 2014 AT 5:38 AM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,840 posts

The 30 minute process is repeating the 10 minute 3 times but the light has to go out after 10 minutes and it should have been flashing, not on steady.

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Friday, June 6th, 2014 AT 11:56 AM
  • Tiny
  • joedsmith
  • Member

You have been very helpful.

Thank you !

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Friday, June 6th, 2014 AT 2:03 PM

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