Turn signal won't click back after I make a turn. I have to manually flick the switch to turn the signal light off.

is this the turn signal your referring to or the the headlight high beam? Try the basics first. I might suggest silly, obvious things here but even I've done stuff like this.
The stalk switch should turn the turn signal off by flicking it up or down. (Left side of the steering column behind the steering wheel). If your high beam is staying on try pulling the same stalk towards you feeling for the 'click' as the lights switch back to dipped beam.
If none of this works the switch itself could be faulty.
The Saturn is an older car so parts will wear out.

Your turn signal switch is suspect,click on link to see how to replace.http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?fromSearchPage=true&pageId=0900c1528025f08e&partName=Turn+Signal+Switch&partId=0900c1528025f08e Here's the part.

turn signal flasher. check your user manual for location and style

you need to replace the turn signal switch there is a tab on the tip that get pushed by a canceling cam most gm dealers can get it for you i have a couple but i don't ship or take checks

You will need to replace the turn signal switch assmbly, it is defective, nothing else causes this problem.

go to an accredited auto electrician for electrical work
it may be a switch problem but I think that there is no power to the light relays ( switch or fuses)
if that model has a light control module , it could be that

multifunction switch, on the column the one that the hazard and turn signals and brights are attached too

The turn signal switch is grounding out somewhere which is probably at the switch and may need to be replaced. That is laziness on the dealers part for not checking the obvious. Tighten the gas cap completely and drive the car 40 to 50 miles and if the system is sealed, the light should go away. Please rate me on this answer.

Will your Center High-Mount Stop Light (CHMSL) illuminate when you depress the brake pedal, but the lower/outer lights will not?
-- Do you have to hold the signal lever in a certain spot to get the turn signals to flash?
-- Do you have to hold the signal lever in a certain spot to get the lower/outer brake lights to illuminate?
-- Will the signals work in one direction, but not the other?
If you answered yes to any of the preceeding questions, your turn signal switch is likely malfunctioning.

**One more question before we continue: Is the turn signal lever not "cancelling" (returning to the "off" position) after you make a turn? If this is the case, you have a broken "cancelling spring."


Before you begin disassembly of your steering column, verify the turn signal flasher is not malfunctioning. If your brake lights work fine, but not the signals (either direction,) then it's likely the flasher is burnt out. The flasher itself is located underneath the dash near where the steering column passes through the firewall

you need a new switch.there is a cam that drops down when you apply turn signal and it is stuck this is called a multifunction switch. should still be under warranty