How do you check the coolant in a 1998 Oldsmobile Intrigue?

Answer 1

Check the coolant level in the overflow bottle. It is a clear(ish) plastic bottle with a flat, black cap on it. There should be a hose going into it that starts at just below the radiator cap. There should be two lines on the bottle, one marking the full level when the coolant is hot, and a lower one that marks the full level when the coolant is cold.
Check the level with the engine off.
If you need to add coolant, pour fresh coolant into the overflow bottle, NOT the radiator itself. You should use a 50/50 mix of Dex-Cool extended life coolant and clean water. Using the green, ethylene glycol coolant can cause damage to your cooling system.
After you add, drive around for awhile until the engine has reached operating temperature, then shut the engine off and check the level again. Top off if needed.