When do you add more brake fluid in a Chevrolet Impala?

You add brake fluid to a Chevrolet Impala (or any car) when the brake fluid level is low in the master cylinder reservoir. This is usually indicated by a low fluid level mark on the reservoir itself.

Important Considerations:

* Never just top off the brake fluid without investigating why it's low. Low brake fluid is a symptom, not the problem. A low level often points to a leak somewhere in the braking system (hoses, calipers, wheel cylinders, etc.), which needs to be repaired immediately. Driving with low brake fluid can lead to brake failure.

* Use the correct type of brake fluid. Consult your Impala's owner's manual to determine the correct DOT specification (e.g., DOT 3, DOT 4, DOT 5.1). Using the wrong type can damage your brake system.

* Be careful when adding brake fluid. Brake fluid is corrosive and can damage paint. Clean up any spills immediately. Also, avoid getting it on your skin.

In short: Don't just add brake fluid because you think you should. Check the reservoir level. If it's low, find and fix the leak before adding fluid. If you're unsure about anything, take your Impala to a qualified mechanic.