Saturn radiators don't have caps to check and add fluid to the radiator you open the overflow tank and add it there
It's only radiator cap is on the coolant reservoir.
The radiator does not have a cap, instead, the coolant system reservoir is also pressurized and the pressure cap is on the reservoir.
On a 1993 Lincoln Town Car : The threaded cap on the engine coolant reservoir is the pressure cap / radiator cap
If Im not mistaken, the Pressure cap for a Saturn is the twist on cap on top of the coolant resovoir, if the cap say under pressure then that is it and to add coolant to radiator you fill it thru the res.
The radiator cap is on the coolant reservoir, which is mounted on the passenger side fender for S series Saturns.
You fill it though the resivoir cap
On a 2001 Saturn L-Series, the radiator cap is located on the top of the radiator itself. It is typically a circular cap that can be unscrewed for coolant access. Ensure the engine is cool before attempting to remove it to avoid injury from hot coolant or steam.
Between the front bumber and engine
It's the overflow tank cap.
the ONLY access to the radiator is the overflowreservoir on the passenger side it has a big black cap and its right above the windshield washer fluid tank
There is a threaded plug at the base of the radiator. Screw it out CC and take the cap off of the radiator.
More than likely it doesn't have direct access to the radiator via a radiator cap. so the high pressure cap would be on your coolant reservoir should say 16 or 15 psi on it. if you need direct radiator access might consider taking loose the top radiator hose.