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Old 06-29-2020, 12:59 AM   #1
gmc684x4
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Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
Ls 4l80E Interchange

I am looking at a 2009 LS 5.3 from a truck
I have 99 van with L31 and a 4l80E Tranny

My question is there any electronic differences for me to use with the 2009 electronics that need to be upgraded for use with the stock 09 ecm ?
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