It is the computer.
If you mean the pcm, then its inside the air filter box on the bottom
It is called a PCM. and it is located in the bottom of the air filter box.
Behind the glove box.
The transmission doesnt have a modulator. Shift points and pressures are controlled by the PCM.
Do not get a "superchip". they are a waste of money. buy a tuned pcm from zzp, dhp, overkill etc. Alot more bang for your buck!
Shinny metal box behind the glove box. Glove box door need only to remove to gain access to PCM.
pass side strut tower
Do you mean PCM? if so it is inside the air filter box on the bottom.
its inside the air intake box.
A chip? If you mean a chip for a performance upgrade, then you should know that the Grand Prix does not use a chip. You have to get your PCM (Computer) reprogrammed. Check out zzperformance.com
Yes you can, but you will need some things Here is a list GTP Supercharger w/ bolts and pulley GTP Throttle body GTP Fuel Injectors GTP Lower Intake Manifold GTP Cylinder Heads w/ valve covers Passenger motor mount GTP Harmonic Ballencer GTP supercharger belt tensioner and idler pulleys GTP MAP sensor GTP Vacuum lines Head Gasket set Head Bolt Set Lower Intake Manifold Gasket GTP Valve Cover Gaskets Supercharger gasket and coolent O Rings Throttle Body Gasket MAP/BBV harness adaptors PCM Tune In my opinion, you would be WAY better off just buying an L67 engine. I have seen those on craigslist from $200 to $500. Ya it will be a little bit more frustrating, but so will putting and replacing parts from a gtp onto your gt. But good luck though :)
Many first you will need a new crank pulley to hold the new SC belt, PCM, Injectors, ZZPerformance has a kit that you need for $200.