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DBW conversion on 2005 lh6

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Old May 19, 2021 | 07:29 PM
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Default DBW conversion on 2005 lh6

okay so i’m very new to this engine swap stuff so don’t bash me but i bought a 2005 denali with an lh6 in it for $300, i plan on swapping it in my 86 trans am with my 700r4. this engine has dbw and i was looking at converting to dbc for the sheet metal intake and my kick down for the trans but i don’t know if my ecm is compatible and how to go about doing it i’m pretty sure i have the e40 ecm. i was doing some research and it seems hit or miss if the ecm has iac or not, i also think this is a 24x engine if that has to do with anything. any help would be appreciated.
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Old May 20, 2021 | 03:26 AM
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If its out of a 2005 Denali then it should have a P59 pcm. You would have to check the service number to see if it has IAC drivers in it or not. Are you sure its an LH6, because I would think it would be an LQ9. Unless it's out of a Trailblazer or something.
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Old May 20, 2021 | 09:49 AM
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Besides all that, an LQ9 is a cast iron 6.0L and the LH6 is an aluminum 5.3. The difference is very obvious.
The LH6 DID come in the GMC Envoy Denali, a midsized SUV.
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Old May 20, 2021 | 10:35 AM
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Originally Posted by ls1nova71
If its out of a 2005 Denali then it should have a P59 pcm. You would have to check the service number to see if it has IAC drivers in it or not. Are you sure its an LH6, because I would think it would be an LQ9. Unless it's out of a Trailblazer or something.
when i ran the vin it came up as an lh6 and the block is aluminum, i’ll have to go up to the shop and check the service number to see what pcm it is.
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