putting an ls2 on an 04 gto
thanks
If you want to go automatic, you need to swap over all of the harnesses and the ECM/TCM from the 2006 car that are different. Going LS2/ 6 speed, would be a lot easier, since you could run it using your 2004 GTO pcm.
Ryan
You will have to swap over the intake, valley cover and knock sensors, wiring harness, reprogram the BCM (which when I have done it required having a connection to GMDealerworld with a Tech2 while programming), driveshaft will need to be a hybrid between the two cars, and if you have the time, just swap the pumpkins too as the '05-'06 models were stronger.
I'd strongly suggest going over to ls1gto.com and asking the same question in the tech forums.
For the cost and time that is involved, I'd just buy a forged long block and a rebuilt auto trans along with the '04 automatic wiring harness that you speak of getting. Make sure to get the trans controller too.



