Pontiac 1996 Grand Prix Owner's Manual page 254

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
a l l .
So,
it isn't a good idea to "top off' your brake fluid.
Adding brake fluid won't correct a leak. I f 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.
'
A
CAUT-ON:
I
-
I
If you have too much brake fluid, it can spill on
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.
When your brake fluid falls to a low level, your brake
warning light will come on. See "Brake System Warning
Light" in the Index.
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