Thread: 03 engine into 02 GP... Direct swap?

Originally Posted by darkhorizon

you dont need any 'custom tune' but you would want to put the 03 file on.

My bad, your correct.

I was basing that statement off running an 03 trans with an older motor. If you have both an 03 Motor and Trans, you can just use a stock 03 PCM (Hardware and Cal).

-Rob