I am having some problems with upgrading my vehicle. It appears this vehicle is too new to find any information, no chilton manuals, no online pics, no OEM parts.. its been rough.

I bought the car used, and it has 100,000+ miles on it, but I love the car. Its in excellent condition. But I want to "pimp my ride".

I was reading on the Grand Prix Store, and it mentions a few things, about intake, and I found a thing about "upgrade the throttle body".

Can someone give me a clue as to where I can find a replaceable Throttle body? What size do I need, that sort of thing.

I was driving my car the other day, I got an error code (Can't remember exactly) DTC P1518 or something, but its "Electronic Throttle Control". I have onstar, and that's what they told my vehicle diagnostics said the problem was. My engine light came on, and I lost power. I cycled the vehicle, and engine light remained on, but I can drive normally. Overnight, the light didn't come back on the next morning, so I thought the problem was fixed, but as soon as I push the pedal hard ( like flooring) within a few minutes, I lost power, engine light, I have to cycle the vehicle, light stays on until I let the car sit for a few hours, and then its ok again. I can drive it fine, as long as I don't "get on it".

So I have 2 questions. How can I get this part replaced (I don't want to do dealer thing, they are expensive) but if I have to buy a dealer part, I will.

I also want to know where EXACTLY the ATS Air Temperature Sensor is. Is this the same as Air Mass Sensor? I am moding my car, I got the cone style air filter, too my stock one out, I tinted my windows, my brakes are gone, so I bought new rotors, hawk pads, steel braided hoses, and I bought a Compustar Remote Start/Alarm, and I upgrade my stereo.. I am keeping this car for a while.

Anyway, I want some help in finding these recommended "upgrades" for my car. I figured since the link to the grand prix store was on here, someone on here could help me figure these things out.

Please, someone, give me some pics of the ATS and Throttle body, and where I can get some upgrade parts for my car. Thank you very much.