The drain is located on the lower right of the radiator and is opened or closed with a screwdriver. It is a plastic plug that does not come out. The surge tank cap must be open for the antifreeze to drain.
It's only radiator cap is on the coolant reservoir.
To remove the oil filter on a 2004 Saturn vue 2.2l. when you open the hood right in between the radiator and motor on the right side. You will see a big black plastic cap with a 1-1/4" socket on top. it has a internal oil filter. just twist the cap off and replace the oil filter and tighten cap back on.
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 2003 Lincoln Aviator : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 2003 Ford Explorer : The thread on 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.
On a 2003 Mercury Sable : The thread on cap on the engine coolant reservoir is the 16 PSI pressure cap / radiator cap
The radiator cap is on the coolant reservoir, which is mounted on the passenger side fender for S series Saturns.
look on the fill cap where it says 5w20 recommended
Saturn radiators don't have caps to check and add fluid to the radiator you open the overflow tank and add it there
The thread on cap on your engine coolant reservoir is the " radiator cap "