i recently got a 2000 gp gt and of course the overdrive is out, i do however have a 3800 engine and tranny in a 2005 buck lacrosse that had been rear ended, now to my quiestion.....what computer do i use if i swap the engine and tranny from the buick to the gp? i am thinking that i would use the buick computer, but idk if it would even hook up to the factory wiring in the gp...i know a lot of the parts are similar and that they used the same basic design or platform or whatever for both cars, but i would rather not have my car in the garage for a month while i figure it out, any help is appreciated, thank you