2003 Chevrolet Impala Owner's Manual - Page 298

There are only two reasons why the brake fluid level in the reservoir might go down. The first is that the brake fluid goes down to an acceptable level during normal brake lining wear. When new linings are put in, the fluid level goes back up. The other reason is that fluid is leaking out of the brake system. If it is, you should have your brake system fixed, since a leak means that sooner or later your brakes won't work well, or won't work at all. When your brake fluid falls to a low level, your brake warning light will come on. See Brake System Warning Light on page 3-33. What to Add When you do need brake fluid, use only DOT-3 brake fluid. Use new brake fluid from a sealed container only. See Part D: Recommended Fluids and Lubricants on page 6- 16. Always clean the brake fluid reservoir cap and the area around the cap before removing it. This will help keep dirt from enterina the reservoir. So, it isn't a good idea to "top off your brake fluid. Adding brake fluid won't correct a leak. If you add fluid when your linings are worn, then you'll have too much fluid when you get new brake linings. You should add (or remove) brake fluid, as necessary, only when work is done on the brake hydraulic system. \. .-..-he wrong kind c . .hid in y--r b,c .. e If you have too much brake fluid, can spill on it the engine. The fluid will burn if the engine is hot enough. You or others could be burned, and your vehicle could be damaged. Add brake fluid only when work is done on the brake hydraulic system. I system, your brakes may not workwell, or they may not even work at This could all. cause a crash. Always use the proper brake iiuid. 5-45