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Programmer does void warranty. And I've had two diesels and two gas rigs programmed. Diesel= take my money!. Gas not so much the ability to change your shift points and keep trans fluid pressure up is nice but the power outputs pretty meh. I did have a flashpaq tuner on my trailblazer ss and the shift point and timing features for higher octane did make a difference but that's a high compression aggressive motor from the factory a 5.4/5.0 whatever motor you have probably doesn't have the same hidden horsepower to be unlocked.
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Adopt-A-Chief- Rachel Santschi
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