Cadillac 2009 STS, Owner'S Manual

Page: 366 / 514

What to Add
DOT-3 brake fluid is recommended. DOT-4 brake fluid
is also compatible with the vehicle’s brake system parts.
However, if DOT-4 fluid is used, it is recommended that
the brake hydraulic system be flushed and refilled with
new DOT-4 fluid at a regular maintenance service
every two years. See Additional Required Services on
page 6-6. 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 helps keep
dirt from entering the reservoir.
{
CAUTION:
With the wrong kind of fluid in the brake hydraulic
system, the brakes might not work well. This could
cause a crash. Always use the proper brake fluid.
Notice:
•
Using the wrong fluid can badly damage brake
hydraulic system parts. For example, just a
few drops of mineral-based oil, such as engine
oil, in the brake hydraulic system can damage
brake hydraulic system parts so badly that they
will have to be replaced. Do not let someone
put in the wrong kind of fluid.
•
If brake fluid is spilled on the vehicle’s painted
surfaces, the paint finish can be damaged.
Be careful not to spill brake fluid on the vehicle.
If you do, wash it off immediately. See Washing
Your Vehicle on page 5-118.
Brake Wear
This vehicle has disc brakes. Disc brake pads have
built-in wear indicators that make a high-pitched warning
sound when the brake pads are worn and new pads are
needed. The sound can come and go or be heard all the
time the vehicle is moving, except when applying the
brake pedal firmly.
5-40