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Old 11-11-2010, 11:20 PM   #31
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Odd indeed. I will be very interested in hearing what the problem is.
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Old 11-11-2010, 11:22 PM   #32
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the only thing that hasn't been tested thoroughly is the pcm. thats the only other thing i can think of, but since nobody has seen a bad pcm on a gxp, it makes me wonder........
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Old 11-11-2010, 11:34 PM   #33
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SUX. I had a LaCrosse with a cracked chip in the PCM. Anythings possible. But it diagnosed itself. It was then I traded up to the BonnevilleGXP. Always sux to take a car in w/ a problem like this to the Stealership out of warranty, no doubt.
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Old 11-11-2010, 11:54 PM   #34
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Just because we have not seen it, doesn't mean it can't happen. The GXP is a newer car with less history to go on. As I said, there is a list of possible causes, start with that list and test the easy first, scratch off each item you test/check, and your left with the cause.
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