1997 Buick Regal Owner's Manual - Page 300
1997 Buick Regal Manual
Page 300 highlights
Checking Coolant If this light comes on, it means you're low on engine coolant. Adding Coolant If you need more coolant, add the proper DEX-COOL@ coolant mixture at coolant recovery tank, but be the careful not to spill it. When your engine cold, the coolant level should be is at the COLD mark or a little When your engine higher. is warm, the level should up to theHOT mark or a be little higher. If the coolantrecovery tank is completely empty, add. coolant to the radiator. (See "Engine Overheating" in the Index.) 6-24