ls1 swap
#1
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ls1 swap
im swapping my junky 4.8 for a ls1 in my 03 sierra and my truck has a fly by wire throttle body, and i want to swap my intake and everything the way it is, can i run the fbw throttle body?
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#9
Your PCM is tuned for a 4.8L so with the 5.7L in there it will still run the engine like a 4.8L. You haven't told the PCM to do anything else so it will continue to think you have a 4.8L. You must have it tuned to recognize the added displacement.