Motors same size just diff year would I still need a retune
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Motors same size just diff year would I still need a retune
More than likely no.
Depends. A 2003 5.3L and a 2004 5.3L should have a different tune. The 2003 is not Flex Fuel and the 2004 is FF.
What motors are you working with?
From an 01 to a 04
Are you swapping EVERYTHING over or just motor?
Just motor
from 01 to 04, that also changes to DBW & has a different harness/computer, from what i remember
2 much 2 hasle with then
If you are doing just a stock 01 with a stock 04 motor only, you should not need a retune. And this is just for a motor only swap. This is assuming you are retaining the intake, all accessories, TB, fuel system, etc.
switching short blocks should be fine... there's a guy on performancetrucks.net selling an LM4 :)
All Aluminum 5.3 LM4 For Sale - PerformanceTrucks.net Forums