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Old 09-04-2012, 02:08 PM
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How to test the GPCM 2007 f250

I have a 2007 F250 that is telling me the GPCM may be bad. (California model P0683). Truck starts and runs just fine most of the time, but it hasnt been under 75 degrees since the light just came on. Just a small shudder on start up every once and a while.

How do I test the GPCM? I have searched and searched, but cant find an answer, just ways to test the GPR, but the California model has the GPCM instead.

Any instructions would be much appreciated!
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Old 09-04-2012, 06:09 PM
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Quote:
Originally Posted by andysam View Post
I have a 2007 F250 that is telling me the GPCM may be bad. (California model P0683). Truck starts and runs just fine most of the time, but it hasnt been under 75 degrees since the light just came on. Just a small shudder on start up every once and a while.

How do I test the GPCM? I have searched and searched, but cant find an answer, just ways to test the GPR, but the California model has the GPCM instead.

Any instructions would be much appreciated!
I do not know the answer to your gpcm question, but I would not expect that to be your problem. Read this........No start issue? Look here.

Sent from my phone that somebody didn't help me get.
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Old 09-04-2012, 06:11 PM
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And this.......Write Up: Monitoring the 6.0L PSD.

Sent from my phone that somebody didn't help me get.
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Old 09-04-2012, 09:30 PM
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Thanks for the links. I think I didn't state it clearly, the truck always starts and runs good. The only issue is that the check engine light is on and it states it could be the GPCM and that is why I want to test it.

Anyone know how to test the GPCM?
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Old 09-05-2012, 03:18 AM
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An easy way is to check the amperages w/ a clamp on ammeter.
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Old 09-05-2012, 03:41 AM
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Google is sometimes the only way....http://lmgtfy.com/?q=Testing+a+6.0+gpcm

Sent from my phone that somebody didn't help me get.
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