1995 Buick Regal Owner's Manual - Page 229

3.1L L82 (Code M) Engine When the engine compartment is hot, the levelshould be at the H mark. When it's cold, the level should be at the C mark. If the fluid is at the ADD mark, you should add fluid. 3.8L L27 (Code L) Engine When the engine compartment is hot, the level should be at the HOT mark. When it's cold,the level should be at the FULL COLD mark. If the fluid is at the ADD mark, you should add fluid. A fluid loss in this system could indicate a problem. Have the system inspected and repaired. 6-21