PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

locked ecm

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Jul 14, 2008 | 10:03 PM

#1

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locked ecm

i am building a 63 split window and installed a ls2 and a magnason supercharger with the new gm ecm and harness but need to tune it and the ecm is locked, gm has not been any help has anybody else experienced this. i cant beleive gm would do this.

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Jul 14, 2008 | 10:05 PM

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FormerVendor

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From: Richmond VA

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I've never heard of a PCM that was locked by GM... (not that it doesn't exist)

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Jul 14, 2008 | 10:21 PM

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this is the brand new harness and ecm offered through gm performance parts.I talked to the guys at the performance trailer at back to the 50's and they said they did it to keep the novice out of them and avoid warranty issues. But it leaves me in a mess

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Jul 15, 2008 | 05:59 AM

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From: on the dyno tuning in MD

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Might try talking to Jesse at Wait4me Performance - he can work miracles with a PCM... He is on here - send him a PM...

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Jul 15, 2008 | 06:31 AM

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From: Houston

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What are you trying to read/tune the PCM with? Can you post any screen shots of the error message your software is generating?

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ecm, frost, lock

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