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Jun 8, 2023 | 12:07 PM

Davfou2013

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Joined: Jun 2023

Posts: 3

Starting issue

I have a 2008 H3 that someone swapped out the 3.7 for a 2006 3.5. They did not change out the wiring harness or pcm. Does this have to be done. Does not want to start right off. Sometimes takes about 3 or 4 try’s.

Jun 8, 2023 | 03:44 PM

hummerz

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Joined: Jul 2012

Posts: 8,999

From: C-Town

Quote:

Originally Posted by Davfou2013

I have a 2008 H3 that someone swapped out the 3.7 for a 2006 3.5.

Jun 8, 2023 | 06:13 PM

Davfou2013

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Joined: Jun 2023

Posts: 3

I have a 2006 3.5 wiring harness and pcm just asking do I need to remove the 3.7 harness and pcm and replace.

Jun 8, 2023 | 07:45 PM

hummerz

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Joined: Jul 2012

Posts: 8,999

From: C-Town

Remove the L52 and replace with a LLR or return it.

Jun 13, 2023 | 07:10 AM

smtichy

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Joined: Oct 2021

Posts: 20

From: Prague, Czech Republic

Recall seeing this ? before ... quick search of the forum turned up this thread
https://www.hummerforums.com/forum/h...7l-3-5l-42195/

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