99 Malibu question, about ecu

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Hey, have a 99 malibu V6. Noticed the 2000 malibu has 15hp more than the 99, and its same body and everything. Does anyone know if the power gain is from the ecu or something else. And if its from the ecu, will the 2000 ecu pin setup match up to replace the 99?

posted by  killer2239

2000 got a different motor

posted by  88GrandPrixSE

You sure, cause they are both a 3.1L, and i read they are same engine. I mean they are same body and everything else in car. I read it just got a 15hp increase.

posted by  killer2239

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