GMC Cadillac CTS 2004 Owner's Manual page 337

If the ignition is in ON and the brake fluid is low, the
"Check Brake Fluid" message will be displayed in
the DIC. See "Check Brake Fluid Message" under DIC
Warnings and Messages on page 3-70.
When your brake fluid falls to a low level, your brake
warning light will come on. See Brake System Warning
Light on page 3-43.
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 Recommended Fluids and Lubricants on
page 6-13.
Always clean the brake fluid reservoir cap and the area
around the cap before removing it. This will help
keep dirt from entering the reservoir.
CAUTION:
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With the wrong kind of fluid in your brake
system, your brakes may not work well, or they
may not even work at all. This could cause a
crash. Always use the proper brake fluid.
Notice:
•
Using the wrong fluid can badly damage brake
system parts. For example, just a few drops of
mineral-based oil, such as engine oil, in your
brake system can damage brake system parts so
badly that they will have to be replaced. Do not
let someone put in the wrong kind of fluid.
•
If you spill brake fluid on your vehicle's painted
surfaces, the paint finish can be damaged.
Be careful not to spill brake fluid on your
vehicle. If you do, wash it off immediately.
See Appearance Care on page 5-92.
5-43