I have a 99 grand am that i put a 3800 supercharged motor ,tranny and axles. I used a 2000 grand prix GTP motor, tranny axle and wiring. I got the motor in and all hooked up but when i used the 2000 grand prix PCM. It would not let the gauge cluster work. The signal is different and the theft system keep kicking in too. So i put the stock grand am one back in it. Then it started up and ran but it ran rich and the tranny did not shift right.But everything else worked. So i need to find a 3800 supercharged PCM that has the same signal as a grand am. Or someone that know how to make a hybrid PCM. Does anyone have any answers.