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ls3 swap NEED HELP

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Old Jan 24, 2016 | 07:34 PM
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Default ls3 swap NEED HELP

Need help!!! I have a ls3 6.2 out of a 2013 camaro going in a 91 silverado what all is needed?
inventory is
6.2
6l80 out of a 2010 escalade
will gm performace engine controller kit work?
what torque converter should i use?
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Old Feb 1, 2016 | 10:08 AM
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Did you get the ecm from the Camaro? The 6L80E has a tcm inside on the valve body, thus they use a canbus line. I don't know if there is a gm controller for this combo. If this is a true LS3 from the Camaro, you will have to get the ecm tuned for the 6L80 and get a wiring harness to connect them. I used Speartech for my LS3 crate motor and 6L80.
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Old Feb 1, 2016 | 12:31 PM
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Yes I have ecm. I've been looking at speartech..thanks for info
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Old Feb 4, 2016 | 02:35 PM
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pretty sure you will need a 58x to 24x converter as well.. not too sure on 91 Silverado ECU setup.
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Old Feb 8, 2016 | 12:24 AM
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I must be missing something. Why does he need a kit to convert from 58x to 24x? The 6l80 and LS3 combination are genIV/58x. Why the step backwards to less resolution?
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Old Feb 8, 2016 | 03:41 PM
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Originally Posted by TJ/LS3
I must be missing something. Why does he need a kit to convert from 58x to 24x? The 6l80 and LS3 combination are genIV/58x. Why the step backwards to less resolution?
You don't need a converter. Have Speartech make the engine harness that works with the 6L80. You'll only be connecting a few wires to the 91 chassis.

Andrew
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Old Jan 14, 2017 | 02:56 PM
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Ahh! Ok, that makes sense.
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Old Jan 14, 2017 | 08:00 PM
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if the camaro had an automatic, your pcm should be fine to use. I'd send the pcm to whoever does your harness so they can flash it for you. Best to use the one company for both. Lots of variables with the E38's vs the old 411 LS1 pcms. You'll definitely need an automatic file for a 6L80E.
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