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Will a PCM reflash at the dealer reset my tune?

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Old 03-02-2010, 11:19 PM
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Default Will a PCM reflash at the dealer reset my tune?

Picking up a new car on friday, the car was dynotuned at magnacharger's facility. The owner told me he took the car to the dealer and had the PCM reflashed because of a problem with the seat memory system.

Trying to figure out if I need to get into contact with Magnacharger and get the tune re-loaded.

Thanks and Cheers!
Old 03-03-2010, 10:53 AM
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27 views and zero input?!?

"If I reset my PCM/Disconnect my Battery/Battery goes dead will I lose my tune?
---Nope... your tune is stored in flash memory... only way to lose it is if you reflash your PCM. It may idle poorly at first while the car is "relearning" how to idle however. This should only last a few minutes."

Said he had it done at the dealer so I'm assuming it was a Reflash?
Old 03-03-2010, 11:18 AM
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Most likely. See if a local tuner can pull your file and compare it to a stock calibration.
Old 03-03-2010, 11:27 AM
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yes it will
Old 03-03-2010, 04:04 PM
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Originally Posted by foff667
yes it will
^^^^

Dealerships are limited, as I understand it, to STOCK, GM-approved bin files for your vin#. Anything else is out of their realm of possibilities.

Personally, I'm not understanding why in the world someone would modify/supercharge a vehicle....have it dyno-tuned....and even let a dealership have so much as a passing glance at the car, much less flash the ECU.

Curious though: don't things like seat memory run through the BCM instead of the PCM??
Old 03-03-2010, 06:06 PM
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Right. I've had stuff related to my BCM reprogrammed and didn't affect the tune at all. Probably the OP meant that.
Old 03-03-2010, 06:44 PM
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Originally Posted by salemetro
^^^^

Dealerships are limited, as I understand it, to STOCK, GM-approved bin files for your vin#. Anything else is out of their realm of possibilities.

Personally, I'm not understanding why in the world someone would modify/supercharge a vehicle....have it dyno-tuned....and even let a dealership have so much as a passing glance at the car, much less flash the ECU.

Curious though: don't things like seat memory run through the BCM instead of the PCM??
That would probably be why i don't think it fixed the seat problem. Never heard of the BCM. How do I got about resetting that?
Old 03-04-2010, 12:03 AM
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im assuming the vehicle your talking about is the cts-v. at the dealership we can only program them back to stock... but if i remember correctly there was a fix out there to reprogram the driver seat position module in order to fix an issue with the seats not moving in the appropriate direction. now that may be what he was talking about.
Old 03-05-2010, 07:17 AM
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All if not most of the time when you take you vehicle into the dealership for certain problems, they will flash the PCM back to stock files, I had that happen to a few customers, I ended up just reloading their tunes...
Old 03-05-2010, 07:40 AM
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for the seats they are going to just flash the bcm.
Old 03-05-2010, 10:08 AM
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Originally Posted by rpmauto
for the seats they are going to just flash the bcm.
Any write ups on reflashing the BCM?
Old 03-05-2010, 10:11 AM
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Well it is reprogramming the BCM, and or the driver seat module, so I doubt it should mess with the PCM calibration. Ask them what module they are programming. I will look to see what is supposed to be done.



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