03 Chevy Cavalier having problems starting

Well lets start here. When you turn the key to start the car over dose the lights in the car go very dim
(if so this is a sign of a low battery or bad connections).

Second when the car actually dose turn over dose the starter motor turn the engine real slow as though the battery sounds as if its going dead (this is a sign of a bad starter but only if the battery is good with clean secure post connections)

Third take a look at your batter terminals, you want to make sure they are tight and that their is no corrosion on the post. If so clean them with wire brush resecure and give it a try.

Let me no and will move on to the next step if needed.

Richard