How do you add antifreeze to a 1990 Cadillac brougham?

To add antifreeze to a 1990 Cadillac Brougham, first ensure the engine is cool and then locate the coolant reservoir, which is typically near the front of the engine bay. Remove the cap, and if necessary, add a 50/50 mixture of antifreeze and distilled water until the level reaches the appropriate mark. Be cautious not to overfill, and check for any leaks after adding the antifreeze. Finally, replace the cap securely before starting the engine.