It uses the cap on the coolant recovery tank as its "radiator cap".
If it has a coolant tank, that's the "cap".
I have a 1995 Skylark and there is no distributor cap.
You have to use the coolant reservoir. You'll notice it's marked as a pressure cap. If it's loose, you'll notice as your temp guage will keep going up and down instead of being steady. Many vehicles do not have a cap ON THE RADIATOR, but instead have a pressure cap on the coolant reservoir. I don't own a Buick Skylark and haven't worked on one, so I can only guess with you.
There are flush-and-fill kits that Prestone makes. It might be more efficient to have it done professionally. I think the cap used on the coolant tank acts as the radiator cap since it mentions the pounds of pressure on the label.
The cap is on the overflow tank, passengers side on top of the fender. It should say something like 15psi on top of it. A parts store could also show you.
The radiator cap is located on top of the radiator.
Check valve in radiator cap malfunction, replace radiator cap.
The thread on cap on your engine coolant reservoir is your pressure cap / radiator cap ( 16 PSI ) on a 1996 Ford Taurus ( all engines )
On the 2.3 Quad 4 Skylark engine the power steering pump is at the front of the engine block behind the radiator, Usualy where you would see the oil dipstick. The cap should say power steering fluid. Check the dipstick that is on the cap, and fill until the dipstick reads full.
You likely need to replace your radiator cap - the rubber seal in the cap is worn.
It is underneath the car. Right by where the oil filter is there is a little cap, and that is it.
The coolant temp sensor on a 97 Buick Century is on the side of the radiator. It is just below the radiator cap.