If it has a coolant tank, that's the "cap".
It uses the cap on the coolant recovery tank as its "radiator cap".
It could be coolant from the coolant tank or radiator, or if it's clear, it's probably just water condensation from the air conditioner.
You can find the 1991 Buick Skylark radiator drain plug on the bottom of the radiator. The radiator drain plug will be in the center of the radiator bottom.
I would say that you are losing coolant somewhere hoses,water pump,radiator.
Coolant is leaking- either onto the ground or into the engine where it mustn't.
The coolant temp sensor on a 97 Buick Century is on the side of the radiator. It is just below the radiator cap.
That is an indication that head gasket is leaking. yes!
The thermostat on a 1991 Buick Skylark is located near the engine. To find the thermostat, follow the top radiator hose directly to the thermostat.
If there is no petcock on the bottom of the radiator then you must remove the lower radiator hose to drain it.
will the fenders from a 1971 Buick Skylark Custom fit a 1972 Buick Skylark?
dexcool its the orange colored coolant