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Actually any OBDII vehicle can be reconfigured to have lean burn, too bad there isn't any step by step simple way of getting the ECU image off, modding the maps and putting it back on.
Also all Euro GM vehicles had lean burn, if you can find an ECU rom image from the euro version of your paticular motor you can gain lean burn, too bad no europeans have the tuning fixation americans have as I have never found a new gm/buick 3800 euro tune rom even though I know that powerplant ended up in europe under different names certain years.
If I had the mind to do it I would have all my vehicles running lean burn on the highway.
Too bad its not so easy.
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