Dealer replacing ECM, is my efi live gone? - Chevy and GMC Duramax Diesel Forum
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post #1 of 32 (permalink) Old 12-04-2014, 04:59 PM Thread Starter
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Dealer replacing ECM, is my efi live gone?

Truck won't start, GM shop says I need new ecm, tuner says efi is gone with old ecm, and I have to buy new one, doesn't sound right to me, 07.5 GMC 3/4T, Dennis
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post #2 of 32 (permalink) Old 12-04-2014, 05:03 PM
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Yes tunes are on ECM. Did you buy tuned ECM or do you have an autocal/V2?

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post #3 of 32 (permalink) Old 12-04-2014, 05:15 PM Thread Starter
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efi live with 5 pos switch
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post #4 of 32 (permalink) Old 12-04-2014, 05:16 PM
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Yes. But was your ecm PRE TUNED or did you flash the tunes on it from your computer

Josh

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post #5 of 32 (permalink) Old 12-04-2014, 05:21 PM Thread Starter
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i just need something because someone stole my dpf filter and cat, so i need something for the check engine light, DW
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post #6 of 32 (permalink) Old 12-04-2014, 05:22 PM Thread Starter
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I took it to a shop, i assumed they flashed it
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post #7 of 32 (permalink) Old 12-04-2014, 05:27 PM
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Can you go back to that shop? Get them to reflash it they will have your vin licence. Do you know who your tuner is?

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post #8 of 32 (permalink) Old 12-04-2014, 05:30 PM Thread Starter
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They said no reflash, just rebuy
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post #9 of 32 (permalink) Old 12-04-2014, 05:33 PM
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Who Said that.

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post #10 of 32 (permalink) Old 12-04-2014, 05:33 PM
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You will have to buy your tunes again. You should get the Autocal to prevent this from happening in future.


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