Mechanics

PCM

2003 Pontiac Grand Am • 3.4L 6 cylinder 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?
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Joedsmith
June 5, 2014.




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.

Wrenchtech
Jun 6, 2014.
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.

Tiny
Joedsmith
Jun 6, 2014.
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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Wrenchtech
Jun 6, 2014.
You have been very helpful.

Thank you !

Tiny
Joedsmith
Jun 6, 2014.

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