Where is it?

I have a 2005 Pontiac Grand Prix, can you tell me where I can check the power steering?

While I can’t give you the exact location of the power steering reservoir on that model, I can guarantee that your Owner’s Manual has that information, including a very nice graphic to help you locate it. And, while you are at it, try to read the entire book in order to learn (belatedly) as much as possible about the safe and economical operation of your car.

And if the poster does not have a manual, what website can they download one from?

Check the power steering what? Fluid? There won’t be any fluid if you have the electric power steering. Do check your owners manual. Read most of it too and you will find it or just look in the index for power steering.