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Tranny swap

Nsane

New member
i have a 2003 monte with a 2000 gtp tranny right now but i am having problems with the external load plug on the gtp tranny, i found a way to get it started (had my pcm programed for a gtp gearing), but i am now looking at a tranny from a 04 s/c regal. i just wanna make sure i dont have to program my pcm again for the s/c regal tranny?
 


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