Saturns commonly have some troubles that benefit from a good throttlebody cleaning, including running rough and a sticking pedal. For a quick check to see if your throttlebody needs cleaned, push down on the quarter circle piece on the end of the throttlebody shaft. If it sticks at all, it needs cleaned. Cleaning is easy and cheap, though, so you may want to clean it anyway.

If you are unfamiliar with how these work, try having someone push on your gas pedal (car off) and watch the throttle plate and surrounding parts. The black quarter-circle piece on the side of the throttle plate housing will be pulled by its attached cable, turning the shaft and moving the plate.

The outside of the plate, as you see here, is normally shiny. The other side, however, is usually rather nasty with an oily sludge.