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6.2 in the house and ready to swap

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Old 03-09-2017, 05:44 PM   #1
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Default 6.2 in the house and ready to swap

6.2 is here. Swapping a 2010 L9H into a 2013 4.8 L20. 6.2 has everything included, harness, e38 ecu, o2 sensors and all accessories. My truck currently has the e38 with a 4l60.

Is there anything other than dropping in the new engine and using my current harness and ecu or do I need to use the 6.2 harness and ecu? I have hptuners and can modify the tune pretty quickly from a stock 2010 L9H or am I oversimplifying things?

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Old 03-09-2017, 10:29 PM   #2
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Shoukd be a drop in swap... use you harness and ecm, iirc the l20 has vvt but no dod, and the l9h is same way, the l9h harness should be set up for a 6l80
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Old 03-10-2017, 06:36 AM   #3
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Quote:
Originally Posted by Wolftrk99 View Post
Shoukd be a drop in swap... use you harness and ecm, iirc the l20 has vvt but no dod, and the l9h is same way, the l9h harness should be set up for a 6l80
Yes u r correct. Both are VVT only and both are Flex Fuel.

Hopefully this will go off without any major problems.
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Old 03-23-2017, 02:31 PM   #4
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Update:

6.2 is in and everything is running great so far. The 6.2 dropped in pretty easily. I used all of the accessories, sensors, ecu, and exhaust manifolds off of the 4.8 (since it was newer). The engine fired and ran pretty well with the stock 4.8 tune, but it really came to life with a stock 6.2 tune I modified. Just finished the MAF side of the tune and am now working on the speed density portion. It's has a couple of degrees of knock around 1200-1800 rpm at .24 to .72g, but I think it's do to being a mix of 87 and 93 in the tank. I'll try straight 93 next and then e85. If it continues, I'll take some spark out of it.

Holy crap what a difference in power. Now when I put some leg into it, I don't have to sit around and wait. Great upgrade so far.

Dyno scheduled for next week.
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Old 06-17-2017, 06:59 PM   #5
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Hey man, I'm looking for some insight, I have a 07 Tahoe flex fuel that I swapped in a 2009 non flex 6.2.i used the harness from the 6.2 and pcm. It's just turning over no start I'm am completely lost.
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Old 06-17-2017, 07:21 PM   #6
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Did you disabled the VATS system?

Are all the settings for various sensors correct for the parts you are using. Like the MAF curve, injectors, MAP sensor settings?
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Old 06-17-2017, 07:35 PM   #7
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Yeah everything was done by my local tuner, but he was explaining to me that since my truck is a flex fuel I would have to get a non flex pump and module for it to run but I just don't want to go out and start buying parts
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Old 06-25-2017, 03:29 PM   #8
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Are y'all running 4l60e still, or swapping over the 6l80e? My understanding is that the latter trans has a computer that comes with it. I have an 07 Tahoe that could use the swap.
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