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Lm4 into lh6 vehicle

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Old Jan 16, 2019 | 12:58 PM
  #1  
michael bush's Avatar
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Default Lm4 into lh6 vehicle

Hi all,
i have a 2006 envoy denali with the LH6. It has a couple failed lifters, so i was thinking of doing the delete. However, i have read that the/some LH6 still used the 24x with the e40 ecm.
If thats the case, then i shouldnt have any issues swapping in a 2003 lm4 from a trailblazer, correct?
If thats not the case, what are my options? I do want to do a cam swap and possibly headers with whatever route i take. I am trying to get to 400-450hp. I would love to do a take-off supercharger, but i dont have the money to do it all correctly and build the trans.
i have enough to build the trans and do a cam swap/headers correctly. This has to be reliable for trips/towing.

lastly, i have efi live from when we did a couple duramaxes, that should work for the gassers right? Just have to buy more licenses?

thank you
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Old Jan 16, 2019 | 01:11 PM
  #2  
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If it is 24X then yes on the engine.
Yes the EFI Live will work just fine on the gasser's
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Old Jan 18, 2019 | 02:05 AM
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LH6 is Gen IV, LM4 is Gen III. If you want 400+ horsepower, buy a L92 or L9H and stick that in your Envoy.
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