is it compatible for the Grand Prix GP? there website says it is but i want too make sure... would any of you guys or gals know?
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Only HP tuners or a DHP tuner can "tune" your grand prix.
Nothing else works, both cost more and require alot more time and knowledge to learn how to tune.
tuning things like air too fuel ratio? fuel injector duty cycle? shift points? ignition timing? i am guessing these tuners you speak of you have too manually adjust these things which takes time and practice...
do they have aftermarket PCMs for the L-26 engine?
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