Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Will a 2007 3.7 be compatable in a 2009

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  #1  
Old 01-26-2016, 08:36 PM
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Default Will a 2007 3.7 be compatable in a 2009

I have a 2009 H3t with a 3.7 and it needs a new motor. I found a 2007 3.7 but I am wondering if I will have issues with the PCM.
 
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Old 01-27-2016, 08:14 AM
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Originally Posted by Heebie3
I have a 2009 H3t with a 3.7 and it needs a new motor. I found a 2007 3.7 but I am wondering if I will have issues with the PCM.
Welcome. Your post was MOVED from the new member area to the H3T section because you are asking a technical question instead of providing an introduction.

Your PCM will have to be reprogrammed.
 
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Old 01-27-2016, 08:45 PM
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Thank you, anything else I should be aware of
 
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Old 01-29-2016, 12:36 PM
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I am going to assume that you will be using your 2009 throttle body with the 2007 motor when it is dropped in. You should be aware that the the 2008 and newer throttle bodies are slightly different than the earlier 2006/7 TBs.

Other than that, your plan should work fairly smooth.
 
  #5  
Old 03-25-2020, 01:22 PM
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Default H3 wiring

Thank you very much. Now I have a few different solutions.

Heebie
 
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